Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bdace642ff0065c…

MALICIOUS

PDF

39.8 KB Created: 2020-08-17 15:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e39465604c170d84d80fd2f1c24c6dc2 SHA-1: 99b9483a0a26ccb69613bc9097ad7dfac22db6fe SHA-256: 4bdace642ff0065cb4eac3336d1a0de2281fe5b44d265a83b047b07fd0c92811
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.cc'. This URL is presented to the user as a download link for a PDF, but it redirects to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=advanced+trainer+second+edition+pdf In PDF document text
    • http://jifamak.silkgallery.ca/uploads/1/3/1/8/131871674/xexipalejanij_bifezezomale.pdfIn PDF document text
    • http://files.kneadedsolacemassage.com/uploads/1/3/0/7/130739826/6c215a4f7a.pdfIn PDF document text
    • http://files.impactliberiamissions.org/uploads/1/3/0/8/130873758/781203.pdfIn PDF document text
    • http://wogotom.regcakes.com/uploads/1/3/0/7/130739573/votebir.pdfIn PDF document text
    • http://jibode.colorscenesbk.com/uploads/1/3/2/6/132682533/958694.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0433/5976/4634/files/36920304184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/5_stages_of_grief_and_loss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/jajiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/67728886739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/jusovajiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/jelijaxowosorizafoxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8118/files/51771274436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/nogukuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/balkanski_spijun_drama.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51AC 1576 bytes
SHA-256: 6dc77115bbcaa92f619502232298add826dc9325864f6012278e5805d76c8bbd
font_01_sfnt_off000059b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B1 5168 bytes
SHA-256: daf463895303e77b052ecf408fbe4b5f163e716c4ab8f2063ad43251b6ad51ac
font_02_sfnt_off00006b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B52 11620 bytes
SHA-256: 83c20510e64aeebd26501917c9944e6e70e367c94a89f31f0a94744fb41b4b55

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