Malicious PDF — malware analysis report

Static analysis result for SHA-256 653427c1f66786c4…

MALICIOUS

PDF

38.8 KB Created: 2020-08-21 01:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e736346c731e5cf0b07542ca9e3bb5ab SHA-1: 69a6d91c9511bd7bc046196409b00e4b55dac8cb SHA-256: 653427c1f66786c4905ff13a2d2eec69d7550455f043e14a48eb0e24a5242579
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure for free downloads, likely leading to phishing or malware. The ML classifier strongly indicates maliciousness.

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=wallpaper+hd+nature++for+android In PDF document text
    • http://files.annaslens.com/uploads/1/3/1/8/131872017/tasuwabur_pawasavaluved.pdfIn PDF document text
    • http://files.creatify.media/uploads/1/3/2/6/132682913/datanakilelodo.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/1/0438/7235/4459/files/91139538326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/nokobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/clipsal_saturn_switches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2944/3238/files/ffx_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/zejijix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/44697404650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0652/3552/files/airtel_money_old_version_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/lolepofowuxubagewapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9506/8565/files/ortopedia_y_traumatologia_silberman_descargar.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 5

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_off00005b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5C 4964 bytes
SHA-256: 726f268624243763e5a0487acf659ba036d029566a62a2650ad510ef9854f3b2
font_01_sfnt_off00006c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 10060 bytes
SHA-256: f55d86d658db3d02e87886a69227221c83941fc0df2d907e368b417fd5fdc333

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