Malicious PDF — malware analysis report

Static analysis result for SHA-256 9074667dd2711aa3…

MALICIOUS

PDF

37.8 KB Created: 2020-08-31 12:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0320472ef660b46d6c694fa54fc8c989 SHA-1: d84fab2daddef341362fdcea3f2d766af4b21976 SHA-256: 9074667dd2711aa329d1c02bf882818f8d99d51a801a68fe2509b61476e58486
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=medical+certificate+format+pdf+rajasthan'. This URL is likely used to redirect users to a malicious site. The document also contains a large number of external PDF links, a common SEO spam technique to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness.

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/wix?keyword=medical+certificate+format+pdf+rajasthan
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/sazujenowigufunudufowil.pdf
    • https://cdn.shopify.com/s/files/1/0463/1130/9469/files/nufigiwelu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7298/6014/files/balanta_de_verificare_cu_4_egalitati.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/sukuf.pdf
    • https://static.usrfiles.com/ugd/93c935_28d40bd1f49349639d9197bdc34351d3.pdf
    • https://static.usrfiles.com/ugd/913720_d85927b3cd26433ba84beb1eeabd3531.pdf
    • https://static.usrfiles.com/ugd/6290de_e78b53f663944ca0ab1d6c2c7801021f.pdf
    • https://static.usrfiles.com/ugd/b65acf_b5a420e397fc4012b0986b19c2f395c2.pdf
    • https://static.usrfiles.com/ugd/89c6ad_2c9e81700d784e968f0b5ec6c0521272.pdf
    • https://static.usrfiles.com/ugd/e23fbb_eaa6abb551214716baa6bc3eeda98b5c.pdf
    • https://static.usrfiles.com/ugd/b56239_a3748850bcb74b2f8e4c33b8381d5d94.pdf
    • https://static.usrfiles.com/ugd/451461_110d04366b384b1cb47911cbc512b174.pdf
    • https://static.usrfiles.com/ugd/9219f8_0de4c4af17b943b6b6ff90d13cb6e5ea.pdf
    • https://static.usrfiles.com/ugd/3de8a6_ec2cd34f3780422db8930c2ae88cd4ac.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/model_aircraft_decals.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/nigijigage.pdf
    • https://cdn.shopify.com/s/files/1/0439/6630/0318/files/59789561953.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_off0000526a.bin
3879b026e52713ac8b913980e1e2b64d33aa0c46cb57918c22e03d349120354d
pdf-font-stream PDF embedded font (sfnt) at offset 0x526A 5476 bytes
font_01_sfnt_off000064e9.bin
8f12303eb5f50456d8282d7c0dabc13667984ed23a05c914d15280c5a3d866cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 10400 bytes