Malicious PDF — malware analysis report

Static analysis result for SHA-256 67779bef2cd0a9a0…

MALICIOUS

PDF

60.8 KB Created: 2020-07-31 02:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc50c29c7b05ce8c59d3021996b6b518 SHA-1: b823c6d1dfb17d6ed6c84b98791bed1cce827abe SHA-256: 67779bef2cd0a9a0093eca8bd1c6e5a828800643dfc989f3f7193c9485793991
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create an SEO link farm, redirecting users through malicious infrastructure. The primary redirector URL is identified as malicious. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely using a lure related to 'Antigeno prostatico total y libre pdf'. The ML classifier also flagged this PDF with high confidence.

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.ru/pify?keyword=antigeno+prostatico+total+y+libre+pdf In PDF document text
    • http://files.sherieunfiltered.com/uploads/1/3/1/0/131070289/puxunuxoxom.pdfIn PDF document text
    • http://files.fixmyscrubber.com/uploads/1/3/2/6/132681855/lanafoz.pdfIn PDF document text
    • http://files.ocvbc.com/uploads/1/3/0/9/130969603/voborubinaboputiva.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/1/0431/1983/7346/files/31157339784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/59484987809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2103/2859/files/loruvuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2225/files/zunokedigesiputifoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/jovejololarireb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/33872622963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/gipefubidupajologe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/12953208424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/ledutazoxojatekunup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/fezesogesilukadofabimanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/88068134720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/70576202936.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_off0000aaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF0 5340 bytes
SHA-256: 51a2f8c53be448ea299186040403e3b555caae70f818bab2d7e75dd2e63978eb
font_01_sfnt_off0000bd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD27 11908 bytes
SHA-256: c620c6139ebf17935c41d69676b651c9ae24e1e0693623e95c846faefeef2190

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