Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a78390dde60bac…

MALICIOUS

PDF

34.0 KB Created: 2020-08-13 22:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc08c85ac198e3d7ac49eada56b51843 SHA-1: 88b876b43e65be0fbc15421f8453c353721c38a0 SHA-256: 72a78390dde60bac230defdd0ef6d8ee85aca3a31e9dcd6a481f3a6cb3a951ba
234 Risk Score

Malware Insights

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

The PDF contains multiple links, including one to a known malicious redirector infrastructure (ttraff.cc) and another to a dynamically generated URL. The document body, though heavily obfuscated, appears to contain the keyword 'step aerobic platform ebay' which is also present in the redirector URL, suggesting a lure for phishing or malware. The ML classifier strongly flagged this PDF as malicious.

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.
  • 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=step+aerobic+platform+ebay In PDF document text
    • http://files.nikkilmoore.com/uploads/1/3/0/8/130873921/c31fb860094.pdfIn PDF document text
    • http://files.everythingipromisedyouisbeingsold.com/uploads/1/3/1/6/131607544/e9bb6e4ddfe2ef.pdfIn PDF document text
    • http://files.professorsilverblank.com/uploads/1/3/1/3/131381363/gutad-nusomavakajawu.pdfIn PDF document text
    • http://files.sarahclariusphotography.com/uploads/1/3/1/1/131164236/defikakad-kixuv.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/1/0431/6200/9755/files/the_secret_of_monkey_island.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/37320644953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/86487630546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6351/9906/files/akuntansi_biaya_buku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/98167406340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/65440909893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0603/3052/files/ordo_alismatales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0362/1025/files/anime_drawing_books_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/numuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/adobe_illustrator_create_editable.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_off0000488d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x488D 5328 bytes
SHA-256: 0084d1e376bc871dc30675e7306f9a3c1c842ebf476d21ac43c53bacea04c005
font_01_sfnt_off00005a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9A 9564 bytes
SHA-256: cc02f76e7eb00fd179987ba41fcd2338b1bd3715ac8bd6d33955db4eb607c8b8

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