Malicious PDF — malware analysis report

Static analysis result for SHA-256 c384e50d7869a822…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 05:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f28a1397726075a2f1d29d6bff1d31ea SHA-1: daa0b1d46545ef9d21fe964b05d009df20a93095 SHA-256: c384e50d7869a822ce36913f4be6ca6de39729a7c229c7be273fb56ba08347f7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword related to interview questions. The document body also contains this URL and numerous other links to PDFs hosted on various domains, many of which are suspicious. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to lead the user to a malicious site.

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=teacher+interview+questions+and+answers+2018 In PDF document text
    • http://sumevurup.campattheeastward.org/uploads/1/3/1/4/131482996/nifemotopaguti_vebapufog.pdfIn PDF document text
    • http://files.enriqueseira.com/uploads/1/3/0/8/130813526/7368529.pdfIn PDF document text
    • http://files.foodandmoodcounseling.net/uploads/1/3/0/7/130776276/dd8072.pdfIn PDF document text
    • http://files.joyuzsong.net/uploads/1/3/1/4/131453998/30581e71b67.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/1/0430/9018/2304/files/51673495528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/accessible_tourism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/cement_bucket_elevator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/fadunafekamonaveruzexori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/xapukozukobowalij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/16036396408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8086/6209/files/25956951605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/90672699354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7193/7441/files/18310843645.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 3

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_off00005e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 5740 bytes
SHA-256: facde68af660c9ae31a9cd6c60bcc21e59dbcddb9a42eeba748efbd0ac7c27e4
font_01_sfnt_off000071ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AB 10176 bytes
SHA-256: abdb9a7d630b7bbbab306e300ef53d20d26f440152a7b748a836d76aa0139030

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