Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8c9b1a221dd201…

MALICIOUS

PDF

38.5 KB Created: 2020-08-05 17:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27e81abad7c40635bf9be91942a6289e SHA-1: 7cb03a8764dfba997d26351d44289340578ee4c6 SHA-256: cd8c9b1a221dd201ad6c528e80d54e4923fcae7c76113b91c57f7a85fcdd1fe1
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to mimic legitimate PDF downloads. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=introduction+to+spatial+statistics+pdf'. This suggests the document's primary purpose is to trick users into clicking malicious links, likely leading to further 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.com/pify?keyword=introduction+to+spatial+statistics+pdf In PDF document text
    • http://files.fmbcec.com/uploads/1/3/0/7/130739510/vowavemij-zesegut.pdfIn PDF document text
    • http://files.rvl8skiboards.com/uploads/1/3/1/0/131070195/puvofenonoxogagewo.pdfIn PDF document text
    • http://guxas.bishopwoodsschool.com/uploads/1/3/1/8/131857315/839f08.pdfIn PDF document text
    • http://files.fairlie.school.nz/uploads/1/3/1/4/131437491/3232886.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/1/0438/0796/5345/files/bjp4_self-_check_4._4_oops4-_errors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/cambridge_english_for_engineering_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/88082972549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/visekuberoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/22209240625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/14817335384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/penarixitijaresatupavit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/45052524519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/lixumojiseketekigiwan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/3_hunna_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/gm_labor_time_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/24536401274.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_off00005891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 5088 bytes
SHA-256: 5982538a97f6c9343c34fac2a207e06ddfcd8db60e06075d297a950de015e30b
font_01_sfnt_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 10188 bytes
SHA-256: f38317d5828224926c74f958ee50bcb50f8325b3906e36dccb682bdab631cf18

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