Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20c2a8d0858b7b1…

MALICIOUS

PDF

49.6 KB Created: 2020-08-09 08:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2fe0defa724a4adc170b650a71c25a73 SHA-1: 9830b6e262dbf1b23f24dfad6efe34e96d025da5 SHA-256: a20c2a8d0858b7b157b0e0191b2734d616501a18f5b1342a3d143546f675c575
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL embedded in the document body. The ML classifier strongly indicates maliciousness. The primary malicious URL is https://ttraff.com/pify?keyword=understanding+evidence+based+public+health+policy+pdf, which likely leads to further malicious content or phishing attempts.

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=understanding+evidence+based+public+health+policy+pdf In PDF document text
    • http://files.tonibeutler.com/uploads/1/3/1/8/131871854/3651723.pdfIn PDF document text
    • http://files.evolutioned.org/uploads/1/3/1/3/131384208/folavune-jerarozisu-golofavoxite.pdfIn PDF document text
    • http://files.apaacupuncture.com/uploads/1/3/2/7/132710497/munifako-gunopoxuwemopu-zalelibida-wediluvisa.pdfIn PDF document text
    • http://files.newellbooks.com/uploads/1/3/0/8/130813797/vapujulo_rajeker_vewidufe.pdfIn PDF document text
    • http://files.worcesterdoula.com/uploads/1/3/1/1/131163914/2967576.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/1/0438/3516/2786/files/60040200469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9228/files/96794295207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/37775716219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/7065211092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/67542003314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/78324230543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/ruwulebudagimibuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/ginirajasutoruxozobate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/wikek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2488/7456/files/archachatina_marginata.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_off000082c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C5 5708 bytes
SHA-256: d4969afec4ac9b4b78fed82a73a0e15425c0df763b83a66c32a67933ffd02704
font_01_sfnt_off00009636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9636 10164 bytes
SHA-256: 719a1d59d043cdd1d2627f4dadbc82594ff2508d43a24d9e9c81ae54c404700b

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