Malicious PDF — malware analysis report

Static analysis result for SHA-256 151efff7529a76fc…

MALICIOUS

PDF

37.9 KB Created: 2020-07-30 14:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5bc24f9d3cf03c7afef3270d74842bdd SHA-1: f8a41a9e5158325543529e0308d76ed3613f2f1f SHA-256: 151efff7529a76fc0837c3fac10406d46f00f4f0cdacc803bd85090144a2c79d
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm and redirects users to a malicious redirector URL, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful content.

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=english+vocabulary+in+use+mccarthy+pdf In PDF document text
    • http://files.alivesoap.com/uploads/1/3/1/8/131871701/0583a.pdfIn PDF document text
    • http://files.danagbeje.com/uploads/1/3/2/8/132814096/libiriner-sogeferejimatas-pelafufonaju-majow.pdfIn PDF document text
    • http://files.allergysafekids.org/uploads/1/3/2/6/132680874/tiburuj.pdfIn PDF document text
    • http://files.gen12church.com/uploads/1/3/1/3/131379231/4507473.pdfIn PDF document text
    • http://files.supercontinent-bp.com/uploads/1/3/1/0/131070011/wokadok.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/1/0435/2016/3999/files/biginuzatufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/49881909569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/gosidazapowekiwatid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/2007573522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/biditawofijud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7739/2794/files/76979174986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/nawewolojexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/fisoperowuvolejovodoliji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8962/3208/files/13988834862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/rizupaxodelazosogamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/buxaterovamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.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_off00005601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5601 5708 bytes
SHA-256: a54d780c0719c9c930cef7d95269b78ed6796c942e8ba5cd289db2d44df254ce
font_01_sfnt_off0000693d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 9168 bytes
SHA-256: b57ad284be3484d5d2ec136b079960f55f3b04eb7c1b090e1e112aaaec47434c

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