Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9528eb5bad8bca…

MALICIOUS

PDF

49.1 KB Created: 2020-07-30 13:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96749d02c1a932e9950985e114350ada SHA-1: 330df1b70602431d772f15e76f693c5445e0e4e0 SHA-256: 8c9528eb5bad8bca4d960e891e171b11e1117119682df778069eed04d3282d66
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traff.cc, disguised as a document about diabetes. It also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

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=epidemiology+of+diabetes+mellitus+type+2+pdf In PDF document text
    • http://files.harrysinkpot.co.uk/uploads/1/3/1/4/131452880/jaroxuvekoriwumano.pdfIn PDF document text
    • http://files.flawlessskinstudio.com/uploads/1/3/1/1/131164002/4000228.pdfIn PDF document text
    • http://files.thepromiselandcamp.com/uploads/1/3/1/8/131857213/pulawuzoruki_tozegugopa_tulasagajexiz.pdfIn PDF document text
    • http://files.kktyonline.com/uploads/1/3/0/7/130738769/lajeritus.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/1/0438/9208/0792/files/dorivofutoresomeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/zaroxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/35920788717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/numejar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/pawubojuzexapukeduvala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/linusetore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/ruxuxizevemibezikiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/jarate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/89303013220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/62127315428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/31061036090.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 6

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_off00008008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 5372 bytes
SHA-256: da43a83df53c550e765760972713271b712d309e161ad26c176a537ed2ba3502
font_01_sfnt_off00009268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9268 10064 bytes
SHA-256: e12a747409e021efaf3192a5e97b3ddb2b7fd2360ffae3cab4de50453d7c275f

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