Malicious PDF — malware analysis report

Static analysis result for SHA-256 753019bc0739cce7…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 14:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0521eadaeebeefb07aaa2cf11e02116b SHA-1: ff9f8425f2c735fad519354154beb9b2f2be2e47 SHA-256: 753019bc0739cce7080c1f6999c23acdd520a5dad3b1c3979292eed047ce704e
202 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which are to a redirector service (ttraff.com) that is flagged as malicious. The document body also contains a reference to the malicious redirector URL. The presence of a large number of external PDF links, many of which are algorithmically generated, suggests a link farm or SEO poisoning tactic to lure victims. The ML classifier also strongly indicated maliciousness.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=cartoon+video++mp4+3gp In PDF document text
    • http://files.mi-sheffield.com/uploads/1/3/1/6/131606368/niludavifek_rerodotite.pdfIn PDF document text
    • http://renibudo.littlejoysremembrancefoundation.org/uploads/1/3/1/6/131606490/japasudeku.pdfIn PDF document text
    • http://luvukida.severndale.org/uploads/1/3/0/8/130874655/vimosadeda.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/1/0432/4465/0651/files/14649236657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/lumero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/30604025245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4793/4359/files/silevokunepum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/ragesodajilisel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/biological_wastewater_treatment_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9759/1701/files/convert_xls_to_xlsx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/gugabozidupux.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 8

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_off00005cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFF 5288 bytes
SHA-256: 7dfe9cd10b7d1ef35f82296e6f1909267b03fd0bd0c67b5bcaa4e478b3b2e992
font_01_sfnt_off00006ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF5 10804 bytes
SHA-256: 749d7a75b81363f25d5e0022c54fdf855e144d4bcd467bc428888f5660dc8875

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