Malicious PDF — malware analysis report

Static analysis result for SHA-256 4638b197ca693218…

MALICIOUS

PDF

50.7 KB Created: 2020-09-10 19:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ef89da265d1213d7fd03ff36c74da38 SHA-1: 3e579f070484cda09a4882e9d6486259f8236275 SHA-256: 4638b197ca6932184e15e5043e0e7959e37b01c1e88d50a09f11d7d39a09c4fe
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though corrupted, contains text suggesting a lure related to 'DMV driving performance evaluation score sheet pdf'. The primary malicious URL identified is https://ttraff.me/wix?keyword=dmv+driving+performance+evaluation+score+sheet+pdf, which likely serves as a gateway to further malicious content. The presence of a link farm heuristic further supports the malicious intent of distributing links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.me/wix?keyword=dmv+driving+performance+evaluation+score+sheet+pdf In PDF document text
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdfIn PDF document text
    • http://wazax.dentalinstrumentcenter.com/uploads/1/3/0/7/130776276/fotuzon_zutapomuvexewil_vomoxizotinimo_pomofoxowo.pdfIn PDF document text
    • http://tilunuwuv.alwaysalphachi.org/uploads/1/3/0/9/130969754/pilowusomave_desazi_sefozava_kudakagogez.pdfIn 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/913720_4898279aedca4a60a424bfab1efd71e9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c618e9_c5a6bfcb8bc04da49c9a9406d01d898a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97634b_0287e0846dba4a848f1d22a1a1bb0040.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bcb9fd_c999dc30b0084ecbb2b861b7db86e525.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/affaa6_b1757d9b06e24d8185b9cb80d59486d7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a9248e_9f93542f37ff42079525ef3f39f61a5d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/cummins_diesel_engine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/guitar_sheet_music_for_humble_and_kind.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C7 5628 bytes
SHA-256: a70b959379c64d64c0a1260ed1ee8192bb6b964255db810c671188bea5d07bee
font_01_sfnt_off000098d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D1 10344 bytes
SHA-256: a4c100a3d532a467cc9cb3c70990ec2374e54c15b312fd77670aeae25157f76a

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