Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9781db5920d64d…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 13:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 275703f4d811d81f35d145d6d12273a7 SHA-1: 6644126f0f1ad1a3c20c6d24800dda70b85b119a SHA-256: 8b9781db5920d64dcb46600fb5fa0f8d753a37a7670021ec14f77c97ab704411
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body text, though garbled, includes 'Schedule c form 1040 pdf', suggesting a lure to trick users into clicking the malicious link. The presence of a mass external PDF link farm further supports a malicious intent to distribute harmful content. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a phishing or redirection attack.

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=schedule+c+form+1040+pdf In PDF document text
    • http://setefosin.nataliereynoso.com/uploads/1/3/0/9/130969060/nosanidunuwotimo.pdfIn PDF document text
    • http://files.etagerellc.com/uploads/1/3/1/4/131483249/gikejozifijedade.pdfIn PDF document text
    • http://files.ethiopremier.com/uploads/1/3/2/6/132681440/radujopa-puzewoxezuzu-koruxusoge.pdfIn PDF document text
    • http://files.itismusictime.com/uploads/1/3/0/7/130775400/napuxivejafomusetom.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/1/0432/9173/8277/files/cpu_c_states.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/zeninesezagatovexovolax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/37078665868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/masuzavuludasabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/tunaxawip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6628/5480/files/sikofotovasidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/17574488183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/32475283256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/soxuvuxosakaruseso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/zelaxusafomijoloxugesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/phonetic_alphabet_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/futilolafamiwufix.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
🗂 Part of campaign: etagerellc.com 3 samples

Related samples 6

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_off000060f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F9 5392 bytes
SHA-256: 0d351d29385850cb9a561378b436f4aae4ea5e4d9dc25b9766a36a0314a51a92
font_01_sfnt_off00007336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7336 10596 bytes
SHA-256: 6b44ef42d782da4de4688024195715bc0fdaaa36653fc6a43b4ef49bd82ddb42

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