Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4e0c823377fe3e…

MALICIOUS

PDF

38.0 KB Created: 2020-09-12 17:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44fbded2b71058a0002072aa91cb0810 SHA-1: aa71a58e95272fe45571728e5b998ab29925680e SHA-256: 7e4e0c823377fe3e5ddc79834560cd20ac02cf7b06399a04cd6eff98755454ac
224 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and flagged as malicious redirectors. The document body text, though partially corrupted, includes a lure related to 'Spreadsheet for mac air' and a URL that appears to be part of a link farm designed to distribute malicious content. 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=spreadsheet+for+mac+air In PDF document text
    • http://xemofisep.ckrubbertracks.net/uploads/1/3/1/0/131069860/tugivu.pdfIn PDF document text
    • http://files.ohiocensus.org/uploads/1/3/2/6/132682076/6433606.pdfIn PDF document text
    • http://rixixu.harringtonlanefarmsvillageshop.com/uploads/1/3/1/4/131452903/b6263.pdfIn PDF document text
    • http://nodedenu.acamusic.org/uploads/1/3/1/4/131410685/a1807043c70810.pdfIn PDF document text
    • http://tulikejo.milesalumniatl.com/uploads/1/3/0/9/130969216/7975358.pdfIn PDF document text
    • http://files.penangbtc.com/uploads/1/3/0/7/130776484/8f19265bd94b8d.pdfIn PDF document text
    • http://teranu.coonrapidscrimeprevention.org/uploads/1/3/0/7/130738918/milewimo-zezivodugujej-lizinijimav-dapakut.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/1/0429/8774/9525/files/fibukozetodurotofokoloxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/47818998058.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cfc61_18e3f83e683643ab88b24ae7aaa899ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bfbc46_1781e23e09aa498c8d06fc8fd6c45d05.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 6

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_off000056ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56FF 5464 bytes
SHA-256: 5f2dd5bcc987b6f05015483477572cae36a15b5f1719fffba7dfacc527b4a101
font_01_sfnt_off00006970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 10016 bytes
SHA-256: 0d5344b66c2243a8af7511904b4f392f0b0ad4f2d4bc0e5d1e397bdcfc8f30d2

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