Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f387adbbaa6075…

MALICIOUS

PDF

50.5 KB Created: 2020-08-10 05:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be8cdd7ab318653c80796a3bcf2e2653 SHA-1: 179deb5a5cbfedf9430d54d0d329f1ae34cc33da SHA-256: 86f387adbbaa607522781baa67df314cb33f1dfbab8e29065cc889b14e7d22c9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirector infrastructure like 'ttraff.cc'. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to attract search engine traffic. This suggests a phishing or malware distribution scheme, likely using the 'alternating series test problems pdf' keyword as a lure.

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=alternating+series+test+problems+pdf In PDF document text
    • http://files.compressfirstky.com/uploads/1/3/1/4/131453998/6941965.pdfIn PDF document text
    • http://files.sarahhobbspoetry.co.uk/uploads/1/3/2/7/132741023/e449cf6dff.pdfIn PDF document text
    • http://linudu.krutschworks.com/uploads/1/3/1/4/131407067/disuxoni-labolugawamuguz.pdfIn PDF document text
    • http://files.twcnpc.com/uploads/1/3/0/7/130775490/dikutomif_gasin_fudekujafijuf.pdfIn PDF document text
    • http://muvasada.djfainphotography.com/uploads/1/3/0/8/130813042/51a2f719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/35233964967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/76255008129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/33717066414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4828/4839/files/disadvantages_of_online_banking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/33227115304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/interview_form_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/xumaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/73023705171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/722469010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0448/3993/files/movukowar.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 7

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_off00007304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7304 5280 bytes
SHA-256: 7e6f97d42766271c951466bd3276cef9706ba6687e466c6ed480e89754549144
font_01_sfnt_off000084d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D1 13040 bytes
SHA-256: 587020888aebdba239d50d14de9b1009ac2804c519bb8b36684d0fb8269b54a5
font_02_sfnt_off0000ae73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE73 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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