Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e9103c1dcac145…

MALICIOUS

PDF

44.2 KB Created: 2020-08-16 21:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0146ce2e43328f53d777127ae1e04b97 SHA-1: 565a9fd071df461f4dbfcd0fe26c54590e3ce6f0 SHA-256: a8e9103c1dcac1458d0c3eea31500056812309d35e992b32cecde220635f535c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Autocad 3d landscape models free' and the malicious URL, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content.

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.com/pify?keyword=autocad+3d+landscape+models+free
    • http://files.jasonschwabart.com/uploads/1/3/1/4/131438055/povumozaxegawefaxixi.pdf
    • http://gobirov.happyblogah.com/uploads/1/3/1/6/131637814/mijewanotudul.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/biology_chapter_wise_neet_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/77250338604.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/kofez.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/76201414615.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/pegabenelerofikorepenife.pdf
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/el_camino_del_heroe_libro.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/machiavelli_the_prince_hackett.pdf
    • https://cdn.shopify.com/s/files/1/0429/6933/3916/files/deductive_reasoning_puzzles_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/mujubazixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/21477800965.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_off00006cae.bin
5f319177a4d60e575a7fbaead570dd54e268711218ce393d0984e554088973f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAE 5456 bytes
font_01_sfnt_off00007f1f.bin
a99dee93e8286db06258272934259429ff475efebd48f89aa86de2c51b536bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1F 10492 bytes

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