Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad831e44ea02165e…

MALICIOUS

PDF

38.9 KB Created: 2020-08-23 03:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856ca65f0e9ce5107a4da60c247db9fa SHA-1: 6cb0c3e2ce8a2416e6e59bc1002682939096413d SHA-256: ad831e44ea02165e74cd8113c4cc8b25eb1a375575c4833f1bd024704f90f979
120 Risk Score

Malware Insights

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

The PDF contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body and embedded URLs suggest a lure related to 'audio songs' to entice clicks. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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=chitralahari+audio+songs+please
    • http://files.cejdentalaccountants.co.uk/uploads/1/3/1/4/131438389/1774549.pdf
    • http://fojekajik.tdn921.net/uploads/1/3/0/7/130776031/tasidoxuzuzefuvibax.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/banozetav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/4139482562.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/head_to_toe_assessment_example.pdf
    • https://cdn.shopify.com/s/files/1/0459/6999/7984/files/vovelepuginufewop.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/mekegegapibulidepetiverok.pdf
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/galatea_madeline_miller.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/modawata.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/payment_of_gratuity_act_1972_rules.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/92375641361.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_off00004fb4.bin
58dc9653302730e278bfc3b6360f12be182d9bbb2a59d10fe4700222cf21ab00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB4 5124 bytes
font_01_sfnt_off00006111.bin
90b662d1b36df547b855eda1ad404b6c8403110746c9d0e9df22411a8a2c3d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6111 14976 bytes

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