Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc70791eb285efe…

MALICIOUS

PDF

45.4 KB Created: 2020-08-05 16:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a4baa544df717c595fdc019deb4e9d6 SHA-1: c7e853e99ab00c7fd1eeb3f51aa572d5e33aff24 SHA-256: 5fc70791eb285efefc38893ed745aacbdc31a878085a96523da0c96dfd994e04
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links designed to redirect users to a malicious URL, disguised as a free download for a political theory book. The heuristic firings indicate this is part of a link farm and a redirector, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=an+introduction+to+political+theory+pdf In PDF document text
    • http://files.firstlightdance.com/uploads/1/3/1/8/131857983/nopugi.pdfIn PDF document text
    • http://files.emergingfield.org/uploads/1/3/0/7/130739056/768b42e9be5.pdfIn PDF document text
    • http://files.sacredlivingspiritualcenter.com/uploads/1/3/0/7/130739061/xewali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6867/0620/files/27484220277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1115/1768/files/262602666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/pelexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/waxufedamagagok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/44095353920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/jeroxediguwol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/52336461485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/30617239775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/46060962472.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 3

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_off000066ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FF 5040 bytes
SHA-256: 4a9a7370ce6ba36b1789ea2685042e19184e81f4e03e66c4493fbc4137ca88dd
font_01_sfnt_off0000781d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 10152 bytes
SHA-256: f1e3f997b0deb79ee03d569c5d9bec987abef9d1ed990c5ea3165a8c44d88cc5
font_02_sfnt_off00009acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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