Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a7bf98d674b6b1…

MALICIOUS

PDF

39.4 KB Created: 2020-08-01 14:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6df73ebe0c935970f6f8087e46937aeb SHA-1: 77e0844a09ae62adb4d3bbd813b9182c63f0df7e SHA-256: c3a7bf98d674b6b1ab21c26de94a3f32e7929d37abd6dc5e27d80103142a3e75
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com and ultimately redirect to malicious infrastructure via ttraff.ru. This indicates a phishing or redirection attempt. No scripts were extracted, and the document body was largely unreadable binary data, limiting further analysis of specific payloads.

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.ru/pify?keyword=string+equals+java In PDF document text
    • http://files.sophiasoasisforequines.org/uploads/1/3/1/6/131637190/8695636.pdfIn PDF document text
    • http://files.portoconference2018.org/uploads/1/3/1/3/131379868/pemimubo.pdfIn PDF document text
    • http://files.231fusion.com/uploads/1/3/1/0/131071067/7954523.pdfIn PDF document text
    • http://files.marketingmanusa.com/uploads/1/3/0/7/130775354/8789562.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/1/0430/4296/3613/files/kipemaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/99409901924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/73491780977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/fosalixumid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/19837668075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9901/9682/files/40964262447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5658/5114/files/12666710291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/86243427879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/wutegikebujabefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/dumatejugarebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/54483089746.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_off00005c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C28 5220 bytes
SHA-256: dca727dfcc5b5596957734811a11bbe4abf84e340e44879946b5052a49587fd2
font_01_sfnt_off00006e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 10272 bytes
SHA-256: 74dbb219e6de2e2bdbfd2ec00136795e2dbe3a26d2a4dcf5d9e617a1b51dd77f

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