Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56ef833d3897269…

MALICIOUS

PDF

35.2 KB Created: 2020-08-03 04:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18bc59c01ca6449ff1831ed9f69526a6 SHA-1: c13866259f815f00f121033432a9cc75ec95c4eb SHA-256: f56ef833d3897269dfc38f7a5b81ffcef5a63dc6170ff09c221a476a4d63dd1d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDFs, a technique often used for SEO manipulation or to obscure malicious redirects. One of these links, 'https://ttraff.cc/pify?keyword=gmc+sonoma+repair+manual+pdf', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL is the primary indicator of compromise.

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=gmc+sonoma+repair+manual+pdf In PDF document text
    • http://files.k2physiotherapy.ca/uploads/1/3/1/8/131871814/masupolofaj_tofopon_wexalonaso_babopugetil.pdfIn PDF document text
    • http://files.putitbluntly.org/uploads/1/3/0/7/130740232/4218744.pdfIn PDF document text
    • http://zigaz.salmansyed.com/uploads/1/3/0/7/130776131/vanodidaz-niwixubanudon.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/1/0432/6454/0825/files/xewise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/gazizul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/38251690578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/vatamemavobosunaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/xozususojusadoludifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/da_form_5841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/30809340078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/tovidirisuwejodux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/vejono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/jakawiwexofide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/41327298414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/kexavelumejex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/87944312884.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 3

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_off00004ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD0 5332 bytes
SHA-256: 96832dba62235104fb81c55e4b57445dff389be1d1cf8e315b914cb54c9e9414
font_01_sfnt_off00005cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDD 10320 bytes
SHA-256: 1394fa04fc9f61d31f17a9066eb280ab350f70c7bb712584af01b692bc6b1228

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