Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa28b833023838c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 10:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f1bcd96604fd7bae851d3429c511657 SHA-1: 13984dea985a7f7b36b1f37a6b40e8332ece9aab SHA-256: 9fa28b833023838c46394627f7cde670e84fa1345bfb73710042651f31b1464b
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by the heuristic. This suggests the primary purpose is to redirect the user to a malicious site. The presence of multiple Shopify URLs, while mostly benign, could be part of a broader link farm strategy to obscure the malicious redirector.

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=racing+boca+unidos+formaciones In PDF document text
    • http://files.sailingwildhorses.com/uploads/1/3/1/3/131398598/lepogi-tebonajagabuvet-xatosevepidoji-kafadomonubu.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/1/0430/6868/6497/files/48964892634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/45594431328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/58559435740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/20955732769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/kiburapagutisemagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/zadupixoliko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6588/5351/files/16143807381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/fatinedamafisasevuxesuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/airlock_system_in_pharmaceutical_industry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/edexcel_biology_a_level_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/dukubumodaribavamijowopu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2A 5256 bytes
SHA-256: b8c6afe97aff293b9f6c78e0160bebb29275f193287c20080db504961c9da826
font_01_sfnt_off00006ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE2 10096 bytes
SHA-256: 5138ac364c9ff7e8b35b0441570ba53c4d6bafaa143bd661d76f566552eb4ac1
font_02_sfnt_off0000915e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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