Malicious PDF — malware analysis report

Static analysis result for SHA-256 af23e96e36b4e1fc…

MALICIOUS

PDF

55.2 KB Created: 2020-08-08 04:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3e7e345e8aa08465c35dbb9acdc92e SHA-1: 98909f5aa5b4a107ffb2b42d59311362de701762 SHA-256: af23e96e36b4e1fc79d8eac563122de0f4e7f7e2c7fb1e53c5c1e5558a1f3773
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of a link farm further indicates malicious intent to distribute content or redirect users.

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=asherman+sendromu+pdf
    • http://files.redpointfitness.net/uploads/1/3/0/9/130969260/1699870b.pdf
    • http://files.onyxfuneralplanning.com/uploads/1/3/1/3/131380413/pofadajigivep.pdf
    • http://files.fonproductions.com/uploads/1/3/2/3/132302963/d02fa7768cdbc11.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/25005488442.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/47916628010.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/66339297264.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/xivirelisuberilanasatif.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/jejufi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/47142600342.pdf
    • https://cdn.shopify.com/s/files/1/0431/0469/8535/files/myers_briggs_personality_types.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/pojowidoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/will_affirmative_negative_interrogative.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/2212631821.pdf
    • https://cdn.shopify.com/s/files/1/0431/9087/8372/files/xowon.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/portugues_para_concursos_nova_ortografia.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_off00009afa.bin
9619e5bf9efff40b16e18fe359da0baef5fa0dcc94a827e874ab289d97b8fd54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFA 5240 bytes
font_01_sfnt_off0000ac9e.bin
3913af852633f877f34963f24873c06b3b16f9e9b07ad4326df966eee6b33ca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9E 10404 bytes

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