Malicious PDF — malware analysis report

Static analysis result for SHA-256 291b471820e897b9…

MALICIOUS

PDF

61.4 KB Created: 2020-07-29 05:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 235e210cbe6dd50e032f9aad21c92e59 SHA-1: d172fbd136056a647ba9267e707a909ece9b8d20 SHA-256: 291b471820e897b950a9f926f71846b7c476e52efd62dd1973514c6945c7c9d5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, suggesting it's part of a larger SEO poisoning or link distribution scheme. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious redirector URL is a high-priority indicator of compromise.

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.cc/pify?keyword=que+es+la+psicologia+inversa+pdf In PDF document text
    • http://files.resilientpeople.ca/uploads/1/3/0/9/130969322/minosagu.pdfIn PDF document text
    • http://files.hajarswell.org/uploads/1/3/2/6/132682640/fefozuk.pdfIn PDF document text
    • http://files.galleryatkingston.com/uploads/1/3/1/6/131606094/nedom-jemepa-webeb.pdfIn PDF document text
    • http://files.rainshadowsolar.com/uploads/1/3/1/1/131164202/gerowevuv_tesipawop_golew_nojabolujexa.pdfIn PDF document text
    • http://files.seer-gallery.com/uploads/1/3/0/8/130874204/sesubososidabox-rodolaluwoguj-safagulifil-mesonex.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/1/0438/1625/5650/files/lakivibumoparawul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9312/3491/files/41699888800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5253/0845/files/43676424737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/wegufoxorexizazukor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/83300511734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/35126859490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/zokokuritekazinexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/ruxoruxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/miramevagusumun.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B8 5248 bytes
SHA-256: 1c095dee9cf0904f279573fdbfc0fe447466ab0db9b93be5d16c1bd69fe68a91
font_01_sfnt_off0000ab9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9F 11324 bytes
SHA-256: 530eff99f22517bf35000c296f6306560eb3c957255aac34ae570ebff438ef8f
font_02_sfnt_off0000d08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08E 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1

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