Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b4bd0ac57d0651…

MALICIOUS

PDF

36.9 KB Created: 2020-08-08 14:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b820e31a6e0914ff88aefd3f62b5c5f SHA-1: 8f9fc3ce5dd5d9f9ecac7b095d70d66a7e98800c SHA-256: b4b4bd0ac57d0651a3cdbac0e314639c7f2babcc0b2137586c55608fce28bca6
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate academic resources, but the primary link redirects to a known malicious domain (ttraff.com). This suggests a social engineering tactic to drive traffic to a malicious site, likely for phishing or malware distribution. The presence of numerous other PDF links, many hosted on Shopify, further indicates a link farm strategy to improve search engine ranking for 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=the+synthesis+and+characterization+of+inorganic+compounds+pdf
    • http://files.primeclassutah.com/uploads/1/3/0/7/130775862/refuxuvulili_duvuzaret_sawavivilagoto_mafewo.pdf
    • http://files.annact.com/uploads/1/3/0/8/130813612/6003dbe4523d.pdf
    • http://files.kateyz.com/uploads/1/3/0/7/130739837/faripeku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/zivazodipirenad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/modern_chemistry_textbook_holt.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/folisekazategeweguj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/algebraic_equation_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0444/6240/7847/files/biggest_loser_diet_plan_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7885/files/45699771028.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/xerafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9489/9864/files/xemaxubesowobewig.pdf
    • https://cdn.shopify.com/s/files/1/0433/7333/0586/files/93010298978.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/55966711335.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/nufigewudipaxelufujesun.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_off000043bd.bin
7279572847663924294165db37bd99e078056779cac2d12b6f21dd784e738ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43BD 3924 bytes
font_01_sfnt_off000051c3.bin
ef06673825f7721238ac294b34dceee17341baa99259faeec1a80039e52ca8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C3 5640 bytes
font_02_sfnt_off000064d8.bin
68a48004953646c8226153e93ac87aca8d4c01f396791e5d6ec562ff3e7bc551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D8 9680 bytes

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