Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d725845dc6bb98…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 21:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9448da47ee1258ed21fb544654b7bf3 SHA-1: bad4c53eef244e40a0211736af6a1bcffbc6bf22 SHA-256: b1d725845dc6bb9803ea016bc76583b0d7780bb70a4a6b0f1dd05ac3d76424c1
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.ru' is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign, aiming to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=christian+names+and+their+meaning+pdf
    • http://files.behrmanoutfitting.com/uploads/1/3/1/0/131070678/77588cd4302b04.pdf
    • http://files.moldandwaterdamagespecialistinc.com/uploads/1/3/1/6/131636762/luzotopivitikuk.pdf
    • http://files.phuvu.com/uploads/1/3/1/4/131437464/vokuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42632515291.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4136/files/aetna_medicare_drug_formulary_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6232/0536/files/2011_honda_cr_v_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/wojebodoxozovagamexedezug.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/73459022534.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/rawasenaxanurab.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/3270446421.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/causes_of_land_pollution_in_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/robotics_engineering_basics.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2332/files/practical_reliability_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/nobegasirozazena.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0966/files/accurate_english_complete_course_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/difference_between_atomic_mass_and_atomic_weight.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_off000063f6.bin
1cc9437deb85be736e01e7c092c74c2d44d031721406aa650bac8055f80ed63f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 5328 bytes
font_01_sfnt_off000075e2.bin
1f0e81d19ca4aac978e797a03b60ee8b72220e21a2822e7cee08f8332573ab4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 9768 bytes