Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3773e4f2fa55441…

MALICIOUS

PDF

54.0 KB Created: 2020-08-07 00:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f14c15976c626b3364a6ddc31b7981af SHA-1: 44a2be3c9cf3a4717c058c197b8ec11ec80ba426 SHA-256: a3773e4f2fa55441f4ed0ce4b7dc991130bdded14a320911d92839b46908726f
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links, many pointing to external PDF files, indicative of a link farm. One of these links, 'https://ttraff.cc/pify?keyword=cancionero+catolico+con+partituras+pdf', is identified as a known malicious redirector. The document body contains garbled text along with the malicious URL, suggesting an attempt to disguise or obfuscate the malicious intent. No scripts were extracted, but the primary attack pattern appears to be SEO manipulation and redirection to malicious infrastructure.

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=cancionero+catolico+con+partituras+pdf In PDF document text
    • http://files.patriciavillalobos.com/uploads/1/3/0/8/130813860/juxavasetinejo-widini.pdfIn PDF document text
    • http://files.pilotcomics.com/uploads/1/3/0/9/130969663/raduwidekula.pdfIn PDF document text
    • http://files.myfathershouseworcester.org/uploads/1/3/1/3/131379946/11d7caa3fa294d.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/1/0438/3830/8512/files/75194593439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/60194266101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/candide_ou_l_optimisme_en_arabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2874/2298/files/gukolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/fopafikutujogagaxubelekil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/zufanisanawojuwez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9780/0350/files/tukowosupub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/megetozegewib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/begegututiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/melev.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 4

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_off000087fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FE 5052 bytes
SHA-256: 4e96b0db483072e0cf072559bbef0a6e798215e58301a7190ac58f0c2747795e
font_01_sfnt_off00009936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9936 15992 bytes
SHA-256: b45c523c6b20696e94893b18e3ac7c27acb58d27f8dec9222d8a2ad2a06e6cb6

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