Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfb4dc6eefbccfa…

MALICIOUS

PDF

71.9 KB Created: 2020-07-29 10:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e31b650aa468d014880ab41bba97394 SHA-1: 50342074422a50c98a2a5c49d4dbbb272c075b9a SHA-256: 4bfb4dc6eefbccfa734ed6115bd52940d21191796c1d1ac50a6fd3de986b1208
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to 'cognitive behavioral therapy techniques for anxiety pdf'. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious 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.com/pify?keyword=cognitive+behavioral+therapy+techniques+for+anxiety+pdf In PDF document text
    • http://files.livingwhole.net/uploads/1/3/1/3/131379540/aa25f9a9db01f0.pdfIn PDF document text
    • http://files.cambodiavillageoutreach.org/uploads/1/3/1/3/131380456/f048825a1bdf2d2.pdfIn PDF document text
    • http://files.labrottiecreations.com/uploads/1/3/1/0/131070452/vizak_dogimowezin.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/1/0435/9713/6030/files/55365202634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/kegepigid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/28906924828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/38009865236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/76463136952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4930/2693/files/bogififojumenujajibukoved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4701/files/68299379555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/fedemulalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/29507860384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/16368087201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/60369695157.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 8

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_off0000da92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA92 5820 bytes
SHA-256: b2fa1331fbde9feed53037630c68173e6ec306533d03a709cae111efa3693665
font_01_sfnt_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 10340 bytes
SHA-256: 0c33d937db5698000415457228cd924d564b200417543826deb43e34e710a921

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