Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b6d38ebdaa0592…

MALICIOUS

PDF

61.3 KB Created: 2020-08-05 12:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8bb0e12f65060481856cf908a355246 SHA-1: 7659865c9900ad01daa18d05c26be4c1345c54ad SHA-256: 58b6d38ebdaa0592e4541f2553aec4165b007acbcd391e2229933249c8741398
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure related to reducing PDF size, combined with a call-to-action to install a browser extension or update. It also features a malicious redirector link pointing to 'ttraff.cc', which is a known malicious domain. The document body, though heavily obfuscated, contains text related to PDF size reduction and the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=reduce+pdf+size+acrobat+reader In PDF document text
    • http://files.susancontini.com/uploads/1/3/1/4/131453555/mevudomavi_resopegubaj.pdfIn PDF document text
    • http://files.beacontheatreworkshop.org/uploads/1/3/1/3/131383664/cee3c5.pdfIn PDF document text
    • http://files.drivenfundraising.com/uploads/1/3/0/9/130969313/tusutawir_zubuxuwibunar_sefuxi_koxutem.pdfIn PDF document text
    • http://files.skcda.ca/uploads/1/3/1/6/131607000/7284584.pdfIn PDF document text
    • http://nubarofun.panthermoontea.com/uploads/1/3/1/8/131871650/sotikuzopabuburep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/bexekixawonowarev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/94560520667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/56053602341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/zotesorutote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/23729824041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/84854254645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/gomumijaxixesidepuvafif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/lavofovesoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/gr_country_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/26093815362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/xadiwatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerisorajomowuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/pexuzadepawavazov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA9 6424 bytes
SHA-256: e637e929042e3978bec96b31b3490ba660419ed310d31d627162007a830036f1
font_01_sfnt_off00009c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8A 5312 bytes
SHA-256: 55dcfd5d38b45341944bdcdbc7665824f190d32cd17f86f2fe355471c0b3881c
font_02_sfnt_off0000aeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB8 10128 bytes
SHA-256: b979074117f8bd2300278a248d3f7035c1751ee751cc544f15d8cca4323ed93a
font_03_sfnt_off0000d1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AD 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174