Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1ebd21bd5b2722…

MALICIOUS

PDF

78.9 KB Created: 2020-08-03 12:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15f137a6697f438c463bff054e0e90d1 SHA-1: 33a8ba91f98df98f140c2bca1ad6aaadfc80b5e8 SHA-256: 5f1ebd21bd5b2722dc6ef6b8e7c1f45ea4cbf889273d278b27ce5b5cceec7d1a
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is flagged as malicious. This redirector is part of a link farm designed to appear as legitimate content, likely to trick users into downloading further malware or visiting a phishing site. The ML classifier strongly indicates maliciousness, and the embedded URL confirms the redirection attempt.

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=polarity+of+solvents+pdf In PDF document text
    • http://files.abilitynetwork.org/uploads/1/3/0/9/130969489/rumuzovirubupolum.pdfIn PDF document text
    • http://files.marengofc.com/uploads/1/3/2/7/132740584/1492302.pdfIn PDF document text
    • http://files.artinfluxlondon.com/uploads/1/3/1/1/131164479/wexokesajur_zukewusilipam.pdfIn PDF document text
    • http://files.yamihymelphotography.com/uploads/1/3/2/6/132681625/jobimujox.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/1/0434/4211/0625/files/rekuwesitev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/wevovibog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/97835314497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/rezekorunigegufetugobalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/13960065365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/gikerit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/smiley_face_sticker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/53924427718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/89288513227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9322/0775/files/zifoduzakuvukuxepofebet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/budigo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CC 6492 bytes
SHA-256: cf6bcbaf462759e04676f8989e7e87ed4d43c4317550ddbd0c5684ab0bd17b73
font_01_sfnt_off0000e900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 5196 bytes
SHA-256: e20a611a657110d9e480452ad1a20692eacd0558e95fa1f3477a76c3bee6c112
font_02_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 16156 bytes
SHA-256: 1fab629e220d95cbc21a7f5071cc9a10ab77ace4bf1ba1fea9ef74081ea7129e

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