Malicious PDF — malware analysis report

Static analysis result for SHA-256 660f9870e1f6bdd2…

MALICIOUS

PDF

45.3 KB Created: 2020-08-11 19:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17bd2f13a6a2b7adaf11f070afc97a8f SHA-1: 3c1ea6d86d8cbcbb03d2df2efea2c46809ba7e02 SHA-256: 660f9870e1f6bdd26ea9c5460a77d41a6af801ff91d7bd26765f1d8038851b86
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary redirector URL is 'https://ttraff.com/pify?keyword=endocrine+system+pdf+in+english', which is designed to lead users to potentially harmful content. The document body also contains this URL, suggesting an attempt to disguise a malicious link as a free download. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic.

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.com/pify?keyword=endocrine+system+pdf+in+english In PDF document text
    • http://tafilevax.lambertfarmslogisticspark.com/uploads/1/3/2/8/132814930/b19c4b2a01.pdfIn PDF document text
    • http://xokorenu.healthenpointe.com/uploads/1/3/2/7/132741198/d3c2d7cae30.pdfIn PDF document text
    • http://dinubi.hiddencharmdressage.com/uploads/1/3/0/7/130775451/fukibejofup-jafewitubikogik-totol.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/1/0432/2692/3172/files/base64_string_to_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/lexagobajavowufixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/7859228409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2373/5720/files/bodupoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/zalenogax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/statistical_elements_of_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4098/0647/files/48075615830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9890/2438/files/mibimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/fifijogug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/88625697767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1819/7912/files/69224997184.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 1

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_off00006e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E76 5416 bytes
SHA-256: b2147c47592a94d3f3f14cbf3f6bbc7f52ca28c36482bdf9c773dfcef55c4349
font_01_sfnt_off000080cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CC 11188 bytes
SHA-256: 71304220067e4424ce0866cf8f3a6000f8fb17811555ce06b19f741b94e93856

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