Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea83314f69be7ce…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 01:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba06680fdacc047117a654346762800e SHA-1: 23f432592b68e271271322b71aaaba6a8fcae1d0 SHA-256: bea83314f69be7ced4b08c279c18a2ce72113caf4f6ed588e2e2612b72d4ee04
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=coshh+risk+assessment+template+2015'. The document body, though heavily obfuscated, appears to contain text related to 'coshh risk assessment template 2015', suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=coshh+risk+assessment+template+2015
    • http://files.cinemakomunisto.com/uploads/1/3/1/4/131407708/ditegosixa_xajefo_jiminalurukopu.pdf
    • http://files.eunjukang.net/uploads/1/3/1/4/131407980/b476670.pdf
    • http://xalok.buyers-club-solar.com/uploads/1/3/1/4/131437462/3968380.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4871/files/bujudakawagubuwiruruzixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2827/files/cml_treatment_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/pidiratilitotew.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/29388699111.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/66526741453.pdf
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/1527513112.pdf
    • https://cdn.shopify.com/s/files/1/0454/4793/8206/files/irrational_numbers_worksheet_kuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/7288/8742/files/harry_potter_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/enrique_iglesias_dimel.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_off00005f18.bin
cac0742f525eb5b998bddf944d10f6932982a71df9f44a7e3dd4f8e75697a04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 5476 bytes
font_01_sfnt_off00007194.bin
dbb87f6f1e688118b16abbbfbf949390a8341b03528ee9736ebf59acacce72d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7194 9688 bytes

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