Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1564bbaabb6583e…

MALICIOUS

PDF

34.8 KB Created: 2020-08-01 05:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fd7255f672e0ec7d575383d9ecaa995 SHA-1: fcc89854f268b42f3456211da8d9c8c8678348ea SHA-256: c1564bbaabb6583ea2b041cd87f3ebf03c7fae77b2bde8b66fea6246a28574ec
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One critical heuristic indicates these links point to a malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=virtual+earth+worm+dissection`. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links hosted on domains like `cdn.shopify.com` and various other file-hosting sites. This suggests the primary purpose is to redirect the user to malicious content.

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.com/pify?keyword=virtual+earth+worm+dissection
    • http://files.ensemblemusicahumana.com/uploads/1/3/0/7/130739595/vafipedikilidokuvowo.pdf
    • http://files.coloradocattlewomen.com/uploads/1/3/1/4/131437123/fedew_sepokasiz_liweli.pdf
    • http://files.firesportukgolf.co.uk/uploads/1/3/0/9/130969356/tanurisu_nelazomemi_gipesoxefotedo_nubuxudo.pdf
    • http://files.ctlymelight.org/uploads/1/3/0/8/130813054/pusedugadova-tulugip-rodasizagidiv-zejivamatenef.pdf
    • http://files.dylanness.com/uploads/1/3/0/9/130969819/860cb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4069/files/junigeporigasejije.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/30524583984.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/wopofujaxodiboz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/nodalipuwaxixozo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/86380536447.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/kinopaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/debaxowume.pdf
    • https://cdn.shopify.com/s/files/1/0430/8729/8714/files/48973636382.pdf
    • https://cdn.shopify.com/s/files/1/0437/1588/7256/files/jiruruzufibuzejaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/39703326455.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a74.bin
afc62d07a29f90335f8375f33669b8d03c2e128527db9e02fc5db20021682b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A74 5236 bytes
font_01_sfnt_off00005c25.bin
78481f9a751bc9a1b79fc80efdfd1666edc99b9fbb37c7b194eead740c9de730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C25 10008 bytes

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