Malicious PDF — malware analysis report

Static analysis result for SHA-256 82281197834cd176…

MALICIOUS

PDF

67.2 KB Created: 2020-09-01 00:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5bc2ac7a6b1794b0d6f6460e1e190a5c SHA-1: 1098cff7d8a170e3b8b40f2160ff618c3dbbb107 SHA-256: 82281197834cd17643d12079f69f228c917e4ce1e2a4e7342cb0c4676e1bc605
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links, including one to a known malicious redirector, ttraff.com. It also employs a social engineering tactic, instructing the user to install a browser extension or update, which is a common lure for credential theft or malware. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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.com/wix?keyword=lowercase+css+text-+transform In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a2d007_e554d5faa8c24fbeb7a0ab3acac3536f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1de29_1c6e105f9b174e0e9c26da4fcf394f67.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b58d21_3a9bf555be7045e4a86a8bfbba9ddeb8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_611ab0e9ed0f4056b6505d083582c493.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e42ee3_554ccb0d5fd645b9ad89f4066031a824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/acoustic_guitar_scales_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/94722492503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1482/2811/files/jobemadomeregefaxama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/department_of_transportation_form_hs_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/dudutowetodisuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/tanda_dan_gejala_abortus_imminens_pd.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E03 9508 bytes
SHA-256: ec7f28c7062bb1d97bd88ff9d20c6870c4154e86cad04cf55a231a5e372fc0b9
font_01_sfnt_off00009d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D52 5128 bytes
SHA-256: b1501e5753fa2e121f3aaea93ffddc41dad4f00c46ca5707871225936a87289e
font_02_sfnt_off0000aec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC7 4136 bytes
SHA-256: 3b7355815ae7abd230565a57ed8143757be6e7446cd99953b281f4f784c0711c
font_03_sfnt_off0000be8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8D 18864 bytes
SHA-256: 09819c7e15312f56ba23cdd30694f952520af5f055105cf3d4cc3e5ecf448ced
font_04_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 1740 bytes
SHA-256: 30155f06aedfb79de9f70f3e8e1372addaeb1c7fe56136300e854ed0c3fac0c5

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