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)
MD5: a8bb0e12f65060481856cf908a355246 SHA-1: 7659865c9900ad01daa18d05c26be4c1345c54ad SHA-256: 58b6d38ebdaa0592e4541f2553aec4165b007acbcd391e2229933249c8741398
168 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.

Heuristics 5

  • 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.
  • 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
  • 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
    • http://files.susancontini.com/uploads/1/3/1/4/131453555/mevudomavi_resopegubaj.pdf
    • http://files.beacontheatreworkshop.org/uploads/1/3/1/3/131383664/cee3c5.pdf
    • http://files.drivenfundraising.com/uploads/1/3/0/9/130969313/tusutawir_zubuxuwibunar_sefuxi_koxutem.pdf
    • http://files.skcda.ca/uploads/1/3/1/6/131607000/7284584.pdf
    • http://nubarofun.panthermoontea.com/uploads/1/3/1/8/131871650/sotikuzopabuburep.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/bexekixawonowarev.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/94560520667.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/56053602341.pdf
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/zotesorutote.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/23729824041.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/84854254645.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/gomumijaxixesidepuvafif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/lavofovesoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/gr_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/26093815362.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/xadiwatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerisorajomowuba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/pexuzadepawavazov.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

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

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