Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf8718fea209dab…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 18:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61da7c74b54f43697db562c8c6eede9 SHA-1: 06a35745e3901e5125f11f7a0d0703e54f71be80 SHA-256: 8cf8718fea209dabc4ad8d1dbd586281be2f2ad9f7b8f19751db572ca8dbeee6
150 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. It also contains a large number of embedded links, forming a link farm, with the primary redirector pointing to 'https://ttraff.ru/pify?keyword=adkar+assabah+maktouba+pdf'. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise.

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=adkar+assabah+maktouba+pdf
    • http://files.hlbentley.co.uk/uploads/1/3/1/6/131637043/gimixafubo.pdf
    • http://files.thedreamteammortgage.com/uploads/1/3/1/1/131163867/ginezuvefare.pdf
    • http://files.almamusicstudio.com/uploads/1/3/1/6/131606965/167e80ebbf.pdf
    • http://nizilab.familymatterseducation.com/uploads/1/3/1/4/131453284/8ae35888.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/27598947120.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/foxobovudasegajew.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/35742144883.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/pokemon_solar_light_and_lunar_dark_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/sujimipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/kobodipuxudobaliwuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/mejobezadoxar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/39757691152.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/john_deere_snowmobile.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/tikewu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/86770052238.pdf
    • https://cdn.shopify.com/s/files/1/0438/7835/1003/files/bootstrap_login_form.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_off00005792.bin
30d53c8fda667812fede34a3f31af2b9b552a9358b9627ee67420723a0f76d9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5792 5444 bytes
font_01_sfnt_off000069e3.bin
261daa9459ba828fe4fe9a18752376f5ed62970c6fbfa683b036fe48b876219a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E3 9220 bytes
font_02_sfnt_off000089b8.bin
60a5c01294947b861a9c4bc460e8796d0d006c969b866edec81cea26efee6595
pdf-font-stream PDF embedded font (sfnt) at offset 0x89B8 16940 bytes