Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe98e9c002476a6…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 18:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8961ed5d38ed382fe11beb3941cc47f9 SHA-1: d92712af071b59a3aa0e6c6224143a2f9b9a5363 SHA-256: 3fe98e9c002476a6328d0cb05c8571d0cb7514b55fe40bca7c0a2b4953cb9640
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=acronis+disk+director+11+full'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm SEO tactic to obscure the malicious intent. No scripts were extracted from this sample.

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=acronis+disk+director+11+full
    • http://files.curiositytransforms.com/uploads/1/3/0/7/130776060/3276090.pdf
    • http://files.onelegchallenge.org/uploads/1/3/0/7/130775413/newipefogu-nivazutibino-rufevila-zejis.pdf
    • http://zepuwo.nonstopfunsocal.com/uploads/1/3/0/7/130776433/rasaseguvegab-todopudofubi-nakaxe-kaxuvigetava.pdf
    • http://files.tobyupci.com/uploads/1/3/0/8/130814784/68b7a0eb.pdf
    • http://voxakig.porterforcanton.com/uploads/1/3/0/8/130815017/bekoroj.pdf
    • https://cdn.shopify.com/s/files/1/0447/8740/0864/files/new_antidiabetic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/adjectives_exercises_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/kufukojaforuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/subil.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2949/files/75126424900.pdf
    • https://cdn.shopify.com/s/files/1/0449/9347/8814/files/bacon_s_manifesto.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/lokevedopezezerebeto.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/critical_path_method_network_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/baby_boomers_meme.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/200_investment_banking_interview_questions_and_answers.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_off000060b2.bin
0eacbe798cf5657d3d646d1e5bbdbea69f5e3a40275f43c073a1d63aa769ec64
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 4912 bytes
font_01_sfnt_off00007176.bin
22c86bb8a6395985557191faa13602c150872f48508419655ba8f2e2e007ed22
pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 11508 bytes