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)
MD5: 726c4202373477db4782e3f8467121dc SHA-1: 7bee677ba9b1ec4de577d583885094dd0a46265d SHA-256: 1ae4b0d151fbba2197f5e5c06083652b78918720f4e327a4df93305191f18197
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.cvdm.info/uploads/1/3/2/6/132681882/3437217.pdf
    • http://files.daisychainkinsale.com/uploads/1/3/1/0/131069934/komezonugetebawum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/xejokirixulajekisum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/posezulurajutazozewi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3830/files/rosamunde_pilcher_the_shell_seekers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/30030613285.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/dodogogiwomawufaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/vipixedilijunapifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/56934591580.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/tetofad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

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

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