Malicious PDF — malware analysis report

Static analysis result for SHA-256 90583366a20a8dee…

MALICIOUS

PDF

48.3 KB Created: 2020-09-07 20:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c197a97149f693e7ffbf0d7d173ad1d9 SHA-1: 7f2b2a8256ce3df718886a5903ff63bbf5ade9a9 SHA-256: 90583366a20a8dee9bfcd41e2474fb4a9b3fed7498391b833a0e9446383582af
202 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. This URL is presented to the user as a download for 'Adobe Acrobat DC Standard Trial', a common lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to 'static.usrfiles.com', likely to improve search engine ranking for the lure. No scripts were extracted from this sample.

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.
  • 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.me/wix?keyword=adobe+acrobat+dc+standard++trial 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/8d5d69_cbf744228fd84f74b202bc503c4cae18.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/120f26_70713d2382d64402b2236fd906856498.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/02af14_8b2e5645004c4e6f832777f31eee8573.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/19103d_f930db4158f348d2a7f089281863f005.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/18122d_95ec78905970462aafd672087fbadd53.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/764aaa_53d13486428d4f6cbbb2015c2a430dd3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c836c3_9df30ca3be1742ed9ed951c81437fccd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/73c254_485d7a4355be4b3f8d7df5287754b2b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a8c229_8a2fe6aa17814cecb6d9863525820a17.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7ab08_3ab6b269d1e44a89b2eb5620fa69c299.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5ea691_b891d25f867941ce9c21d2d15388c52a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97aff7_fcfaeaa15f8a49e79078dc593b64ca8f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ae15ca_1ceee1435db6417ebfa3e368a2c39c3e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b8529f23e5684facae91fdc610ea223f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e0cb9_98ae9632fe934dc193ef84d26872ca2c.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5482 5236 bytes
SHA-256: 5d76b9f44c5bea5b7d7e65ac1742eb1eef2d0a0bedea1f2c6afd430590136af0
font_01_sfnt_off000066ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 5060 bytes
SHA-256: 4085380b61582de061ec0130dc869892cdffe4722da38eff3b2a7a9baa3c7972
font_02_sfnt_off0000782c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782C 10164 bytes
SHA-256: 5c5fcdb022066d98c85d8629fe1172365797ab150d37a65de070c44a24ef087b
font_03_sfnt_off00009b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2B 16488 bytes
SHA-256: 6a519f54f5516a02950eed31c222a33217e1daf964577f37e3b402c146ae77cd

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