Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d48af735671381a…

MALICIOUS

PDF

39.5 KB Created: 2020-08-26 01:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02165e36f5f2beb6e09c544a6e4367d7 SHA-1: 393cbe01dc6146e8552a4ae2c6e7b29a73fa1a66 SHA-256: 6d48af735671381ae426054cbd7a1506bf359c29b45ea6dedface133d07b9a68
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically `ttraff.club`, which is flagged as malicious. These links are presented as a lure for downloading a "leed core concepts guide v4 pdf free", indicating a phishing or scam attempt. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm designed to attract traffic and potentially distribute malware. The ML classifier also strongly indicated maliciousness.

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.club/pify?keyword=leed+core+concepts+guide+v4+pdf+free In PDF document text
    • http://demul.forgecraftsteelfabricators.co.uk/uploads/1/3/1/4/131483152/natutipa.pdfIn PDF document text
    • http://vuloluwax.calvinchurchri.org/uploads/1/3/1/4/131406744/8f30d6a.pdfIn PDF document text
    • http://mafid.guesteyes.com/uploads/1/3/1/6/131637419/896619.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/1/0463/8405/4427/files/libexuwozoden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/tikavigokemugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/51172857730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/19893059109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/1126663826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/acute_otitis_media_treatment_guidelines_idsa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/74718482726.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_off00005b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6E 5168 bytes
SHA-256: af0a6a68a3378601d2c795e6c5e0fd73ae92d2f9d7354b250e02b3ae3f46c827
font_01_sfnt_off00006d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D25 10672 bytes
SHA-256: 7fbc281fda9ea0fb2d7e6e72adf2cc88cd1c4c6368f79c2d705d7b2f4686bd75

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