Malicious PDF — malware analysis report

Static analysis result for SHA-256 839a4308e8e67a3e…

MALICIOUS

PDF

36.4 KB Created: 2020-08-25 09:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 535143e2016257d24bb547eedc8c9757 SHA-1: 7ff201ccb78804287250c33181d75cc63a7b762a SHA-256: 839a4308e8e67a3e5114ee807d546c2dc14c660bf630cbf0982ba9c23fb5c180
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body text, though heavily obfuscated, contains references to a game mod download lure, suggesting a phishing attempt. The presence of multiple external PDF links further indicates a link farm designed to attract traffic.

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=granny+horror+mod+apk+revdl In PDF document text
    • http://files.wctohio.com/uploads/1/3/2/7/132741225/8576239.pdfIn PDF document text
    • http://wokaroded.alacolorado.com/uploads/1/3/0/9/130968973/c0630e0bcf209.pdfIn PDF document text
    • http://xuvopifa.thehockeyprofessor.org/uploads/1/3/0/8/130874426/lijulamuzo_dakow.pdfIn PDF document text
    • http://lefenis.langtechfun.com/uploads/1/3/0/7/130776485/zamalilojurix.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/1/0438/6209/8085/files/wobudok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/82935966106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9997/8904/files/92558694836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/rotomovevubur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0600/0282/files/pevidaretovel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/80512049281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/93217663261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/11702118545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3859/2424/files/principles_of_effective_business_communication.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_off00004fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC7 5280 bytes
SHA-256: 4988fb6df9a0c1c5660353fe22d37e0a8d7f987426ffd93d1a36c0d5cf080711
font_01_sfnt_off000061a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A0 10328 bytes
SHA-256: a34b00363c7db32f8357d2aec21a769f3f0aa6a530546d40927a25680e5e0b2e

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