Malicious PDF — malware analysis report

Static analysis result for SHA-256 8755633c8f7b6bab…

MALICIOUS

PDF

32.1 KB Created: 2020-08-18 21:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53b2b8742e24551ef29d4ab257a08599 SHA-1: c50988bad04ca665564428fb3f51fb91b5fd86fe SHA-256: 8755633c8f7b6bab1675ad00cc20b0730bc104996b4eba5f75835f8129840b27
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service identified as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a datasheet, likely leading to a phishing or malware download site. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms a malicious intent to direct users to harmful content.

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=chesterton+601+datasheet In PDF document text
    • http://dikizef.lasalservices.com/uploads/1/3/1/6/131637136/dasapilu.pdfIn PDF document text
    • http://puwubu.jwesleyfoundation.com/uploads/1/3/0/9/130969465/8680529.pdfIn PDF document text
    • http://files.grayfurnaceman.com/uploads/1/3/0/7/130775850/462186.pdfIn PDF document text
    • http://files.hillmarfarm.com/uploads/1/3/1/8/131856186/5b5ee94.pdfIn PDF document text
    • http://files.annjamescounseling.com/uploads/1/3/2/6/132681910/829544.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/1/0429/3001/2316/files/jijiramirotunugiwoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/64764980765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/96895494284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/bajaraxomegonudijif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/rovizotifuwuluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4017/7308/files/56896125691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/39386483874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/ferorotaginawumux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/apostila_autocad_civil_3d_2020.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_off00004240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4240 5132 bytes
SHA-256: c56ca1e3e2f82c0d9e7939a8c4bc153f5ecf6072b007c414f5fbf876389b72b3
font_01_sfnt_off000053af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53AF 9504 bytes
SHA-256: a668e696bf992531355756d605ea03c010b3fda8904f805fdef0a65931351ecb

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