Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cd6fb697688c74…

MALICIOUS

PDF

41.5 KB Created: 2020-08-28 04:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c64af348c27ffee1330218457e32fb20 SHA-1: 63e234498162172fa208d40a3e583bbd3beb5d7b SHA-256: c4cd6fb697688c74ea85fac1024eaa8c21e8fa8ce73fa0aaac395ce609ac5466
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=fridge+repair+manual', suggesting a lure to a malicious site. The presence of numerous Shopify-hosted PDF links indicates a link farm used for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=fridge+repair+manual In PDF document text
    • http://files.mybabybooksa.com/uploads/1/3/1/3/131380337/2c139b8cfe6a.pdfIn PDF document text
    • http://files.themusicchord.com/uploads/1/3/2/6/132682820/donunalex_xekediw_pisovosa.pdfIn PDF document text
    • http://files.yourspiritwithin.net/uploads/1/3/0/7/130776720/4973864.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/1/0435/0266/5892/files/9824963372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/36358148081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/sawitaguwabenodadolof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/xuvininozijawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1758/2230/files/44951115105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/cbr_test_practical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/xebewifizijalanol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/bm_sharma_physics_jee_main.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/ridakatisemabokiwize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/toruvuwejolijob.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 7

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_off00006563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 5056 bytes
SHA-256: 8a6663a6ded962606490f779e530de0acbab1160b0e3be053f9cae93f9f06cb7
font_01_sfnt_off00007675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7675 10308 bytes
SHA-256: b416f06738003e363a448f083fd248bc35a50679b3142339a5830d59562034e5

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