Malicious PDF — malware analysis report

Static analysis result for SHA-256 838ea2d7fd59b4d6…

MALICIOUS

PDF

113.0 KB Created: 2020-08-02 20:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd75379d4075f8735a9736389c9ae4fc SHA-1: 6b75deeccdd148d1a9f9f39e171e21ba2d30c81c SHA-256: 838ea2d7fd59b4d6940c4b87abb167122906ebbcac74d8b9b4c884b3ec6cde5e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as a study manual, but they redirect to a malicious domain (ttraff.cc). The ML classifier strongly indicated maliciousness, and the presence of many SEO-optimized links suggests a phishing or scam campaign. No scripts were extracted, but the document body and heuristics point to a link-based redirection attack.

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=teas+v+study+manual In PDF document text
    • http://files.kokonfections.com/uploads/1/3/0/8/130813906/7f05e6330c4.pdfIn PDF document text
    • http://files.harlesdencommunityhub.com/uploads/1/3/1/6/131606533/rozezoruveji.pdfIn PDF document text
    • http://files.abrisinfo.net/uploads/1/3/1/4/131453267/tupos.pdfIn PDF document text
    • http://files.arcanagardens.com/uploads/1/3/1/4/131407734/e2f3a87.pdfIn PDF document text
    • http://files.dailybeautyfood.com/uploads/1/3/0/7/130775522/ragip.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/1/0431/2177/0656/files/pojakoruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/3097581202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/87460006643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tukesameb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/tukisajuxoxufowodipoduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/53607161300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/3590062782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/jefegugamereroziminim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/3482874006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5676577217.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 7

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_off000181d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181D3 4984 bytes
SHA-256: de95ee1fec4f27317e44b4894a5a2a4532ffccf3b7a178a22abd261afb3b86a8
font_01_sfnt_off000192c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192C3 10620 bytes
SHA-256: d67220c94543b6781dc41704df465cc8a496c180fc438554328b3b024e6c69c0

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