Malicious PDF — malware analysis report

Static analysis result for SHA-256 942131a0bbffbad9…

MALICIOUS

PDF

47.3 KB Created: 2020-07-26 21:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea47c155baf297a1f947d1ff72d723f0 SHA-1: fb3346e80b9c46d5d08755c45b38b4b5700680bb SHA-256: 942131a0bbffbad9a3feb1f30b7abf9a332ea184c1cd5865c8058efc83be1bed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cisa exam format 2018', suggesting a lure. The presence of a link farm further indicates an attempt to drive traffic to external sites, likely for malicious purposes such as phishing or malware delivery.

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=cisa+exam+format+2018 In PDF document text
    • http://files.omhathayoga.com/uploads/1/3/1/3/131398461/1255d3ee5b7fe.pdfIn PDF document text
    • http://files.maddartphotography.com/uploads/1/3/0/9/130969220/9c40fc424441.pdfIn PDF document text
    • http://files.yranchcattle.com/uploads/1/3/0/7/130775109/8f5c82ca.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/1/0431/9775/9652/files/tifanogalefidutafegobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/6318639352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/12823462705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/31880664128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/vaxajila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/93374765217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/43740385213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/50155302802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7111/8235/files/fonofuzafusim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/gugulesoxipiviwugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/7913317138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/41624987752.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 4

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_off00007bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFB 5172 bytes
SHA-256: d00f6be431a8c680ab9d96d8b3275fc306fda92b4385ee087239e71c6ea438cd
font_01_sfnt_off00008d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D98 10116 bytes
SHA-256: fb55b2879722a8c782947a0511050f6e5f09ae86e9d0fd47f0c4754652948709

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