Malicious PDF — malware analysis report

Static analysis result for SHA-256 c907a64c276f7dde…

MALICIOUS

PDF

36.0 KB Created: 2020-08-03 13:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b01cbed5a85bf860db5543bea7330fe3 SHA-1: d72b8759f83067f52afd4d4c625f5b15b21190d6 SHA-256: c907a64c276f7ddedc7f0994d9451c564e7ecf59d6da5e60de1e4890918da7c7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though malformed, appears to be a lure for a 'reasonable faith pdf free download', suggesting a social engineering tactic to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=reasonable+faith+pdf+free+download In PDF document text
    • http://bikizi.wfgcompass.com/uploads/1/3/2/7/132740892/subamiles.pdfIn PDF document text
    • http://files.flawlessfrenchies.com/uploads/1/3/1/4/131482826/ad44ddf4.pdfIn PDF document text
    • http://files.playtherapyworks.com/uploads/1/3/0/7/130775503/xogixo.pdfIn PDF document text
    • http://dexopodu.tsmega.net/uploads/1/3/2/7/132740805/jipuka.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/1/0427/7361/0663/files/23059295447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/14540222454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1596/8680/files/27172329615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/62587346163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5126/0823/files/72470049178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/11714965524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/kokok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/64961825310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/werirul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/kexilewuzola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/bedugiwubomezatukesip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6448/3240/files/kumibujanumumu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC3 5368 bytes
SHA-256: 1b49e8aa95599f1eed8cc5f413bf96dced49e50d102f62aafa2c099d8956f8c2
font_01_sfnt_off00006109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 9932 bytes
SHA-256: 584d26f04ebd61ab04cb4b49b120b0d6873090752927cb6a0c4e1e20552719c7

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