Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b899a0e156c8358…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 14:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5ae8f387358a5bbcd573bb6365c0019 SHA-1: bf6fea84e0a89be09aae6f98f37af4598f99b7af SHA-256: 3b899a0e156c8358eadf9101caff95f7d23cd22f47d7ea390c3dbb4278717654
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=equidad+e+inclusion+social+pdf'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of numerous other links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to mask the malicious redirect.

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=equidad+e+inclusion+social+pdf
    • http://files.offthebeamwoodworking.com/uploads/1/3/2/7/132741334/bukemotub.pdf
    • http://files.folsomlandscapedesign.com/uploads/1/3/0/7/130776516/3012031.pdf
    • http://files.wendybrant.net/uploads/1/3/1/3/131380397/01bf747e2d04d12.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/algebraic_expressions_and_identities.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/72408731916.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/b_tech_cse_course_viva_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/deginoxopiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/catalogue_schneider_electric.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/el_caracolillo_gustavillo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/moxodopufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/bubifisujukoxibofome.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/81534749630.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/minecraft_pokemon_server_no_mods.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_off000066e0.bin
c80b935bb2e72fbf0bb54bead4dcf673e2ee9ff5a06d35ab91e29c0786333a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E0 1696 bytes
font_01_sfnt_off00006f0a.bin
8a7b25db0ccac58d6d02dd0aefc39e19aaa12a7eb3467683606c40c47f6963e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0A 5136 bytes
font_02_sfnt_off0000809b.bin
373e508e813a138f8bc926216994e967605f0f023d133ab26579976b425b2bbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 10288 bytes