Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae4b0d151fbba21…

MALICIOUS

PDF

38.7 KB Created: 2020-08-21 19:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 726c4202373477db4782e3f8467121dc SHA-1: 7bee677ba9b1ec4de577d583885094dd0a46265d SHA-256: 1ae4b0d151fbba2197f5e5c06083652b78918720f4e327a4df93305191f18197
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, disguised as computer literacy test questions. The redirector URL is `https://ttraff.cc/pify?keyword=keonics+computer+literacy+test+questions+and+answers`. This suggests the document's primary purpose is to redirect the user to malicious content, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=keonics+computer+literacy+test+questions+and+answers In PDF document text
    • http://files.cvdm.info/uploads/1/3/2/6/132681882/3437217.pdfIn PDF document text
    • http://files.daisychainkinsale.com/uploads/1/3/1/0/131069934/komezonugetebawum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/xejokirixulajekisum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/posezulurajutazozewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0154/3830/files/rosamunde_pilcher_the_shell_seekers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/30030613285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/dodogogiwomawufaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/vipixedilijunapifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/56934591580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/tetofad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B29 5392 bytes
SHA-256: c2bf6683f16a9fc21dca765794342b1f976b9d4110ce38124364183bb0cf0312
font_01_sfnt_off00005d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 10016 bytes
SHA-256: c33a2ef621175785b4bf858fc9877de348bafe38bceb9dc2388a976aeacf63a5
font_02_sfnt_off00007f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F85 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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