Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a747e7ed77ab3af…

MALICIOUS

PDF

46.4 KB Created: 2020-08-17 08:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5536b212cd90737044aa7aac73fe7720 SHA-1: e0467ae2eed2f51c294382c2907384bc83c348c7 SHA-256: 2a747e7ed77ab3afbcc7d138b89f0bd9002f0e0e8abd2b9fc2582e0d4a2a9191
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=essay+writing+worksheets+for+5th+grade'. This URL is presented within the document body, disguised as educational content. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify but point to potentially malicious content. The primary malicious URL is the most critical IOC.

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=essay+writing+worksheets+for+5th+grade
    • http://wafifeti.merkthose.com/uploads/1/3/2/6/132681342/717ef7149bd.pdf
    • http://raxoragu.accessdriverrehab.com/uploads/1/3/0/7/130739046/pugos.pdf
    • http://files.alazhartemple195.org/uploads/1/3/1/4/131453990/modifolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/uneb_chemistry_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/20939011134.pdf
    • https://cdn.shopify.com/s/files/1/0437/4888/4634/files/39746031542.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/acmarket_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/levekod.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/camberwell_assessment_of_need.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/adverb_of_time_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/63133201948.pdf
    • https://cdn.shopify.com/s/files/1/0429/8738/9087/files/celtic_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/320359916.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.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_off00007746.bin
8e8b3735923d3feb447a99b4dc9400cbcb5d1050425070d30b2f89ede64b71ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 5476 bytes
font_01_sfnt_off00008a02.bin
f54f7ed7afd439e729a94354d427dca115db227d638f8db91aa9f8df4dd83a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 10204 bytes

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