Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c55ce641c90e1ac…

MALICIOUS

PDF

63.9 KB Created: 2020-09-01 11:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d3ddf5c6c03a9d3625861eacb8404d6 SHA-1: 2d55570ba3aa0578fdccb254be3d1a9e1666ec4d SHA-256: 5c55ce641c90e1ac47e22987c325edd175f55590f80c9a933f17b621f3c028b5
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that lead to a malicious redirector, disguised as a 'pay slip template'. The document body and heuristics indicate a lure for phishing or malware delivery. The ML classifier strongly flags this PDF as malicious, and the presence of multiple SEO-optimized links suggests an attempt to broaden the attack surface.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=pay+slip+template+ms+word In 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/1/0459/7055/5047/files/gerd_silberbauer_synchronsprecher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/nuxetapabivakisejasis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/pamav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4905/7430/files/human_anatomy_bd_chaurasia_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/jixomanuzupuxodubiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/xivemajulavumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/whatsapp_status_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/rowulagusef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/20947695635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6820/2901/files/vapaxowibilipijobuwop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1158/0575/files/93381879005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/32118975449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/78942398097.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 8

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_off0000b315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB315 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off0000bd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD10 5300 bytes
SHA-256: 6beaa3ac8cc41fe670c6d3bfdabceadc47acdbb49230af0553bf9b5da668a617
font_02_sfnt_off0000cf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF12 9832 bytes
SHA-256: 6bb9bb33e36dd28a4ed78af3ef9c907f59efc3eefae51a9912a52addd99b71b4

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