Malicious PDF — malware analysis report

Static analysis result for SHA-256 771c023d03150a72…

MALICIOUS

PDF

50.6 KB Created: 2020-08-22 16:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67d246ff819eb3f54a7d3ba801fe6e56 SHA-1: bfc91a40074ee0ee1592daa65f564f83d71078d0 SHA-256: 771c023d03150a72e7494a1305911c07652d55665845b63fb559da48eb54cbe0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. This suggests a phishing or scam attempt, likely using SEO tactics to lure victims with seemingly legitimate content like 'McKenzie low back exercises pdf'. The ML classifier also strongly indicated maliciousness.

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=mckenzie+low+back+exercises+pdf In PDF document text
    • http://files.simplyobedientk9.com/uploads/1/3/1/4/131408954/masatutonogal.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/1/0428/5143/4659/files/kitenogadijonup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/96001888373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3204/1889/files/candy_dna_model_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/titawusazipudal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/30975372917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/anime_en_latino_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/xodavejolegafopawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/kamevunojokezezulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9114/8454/files/netacad_final_exam_answers_2015.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C9 5276 bytes
SHA-256: 8d57d6470a99969250c6219ceb0110bae2c2467a074571370ffd429120652954
font_01_sfnt_off00008bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD2 10304 bytes
SHA-256: e31c58a67ce4149a5270678d383e4dcf411bcb3db1148d6366e22581a5d804fb
font_02_sfnt_off0000af09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF09 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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