Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e976e82d75bdc8…

MALICIOUS

PDF

120.0 KB Created: 2020-08-08 00:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0d0baf25a01b8d2381ac9e033992898 SHA-1: fba6ed5e2ee864d84f14eb48066d22d1b78529d0 SHA-256: 00e976e82d75bdc83e2a7a2b0f686453963842ec67b45bce3f19e99f6f0ce7af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links to external resources, a technique often used in SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=metabolisme+energi+sel+pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=metabolisme+energi+sel+pdf
    • http://vokakov.soundcityreading.net/uploads/1/3/0/7/130739615/7193950.pdf
    • http://files.everstylebuilders.com/uploads/1/3/0/9/130969402/7716482.pdf
    • http://files.sarahjanegriffiths.com/uploads/1/3/2/3/132302718/1455847.pdf
    • http://files.breakthroughtc.com/uploads/1/3/1/3/131382330/4db3cd35c.pdf
    • http://files.janettesdesignstudios.com/uploads/1/3/0/8/130874025/gokijibujov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/kalphite_queen_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/54552855215.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/dictionary_of_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/41988281091.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/astm_a370_12a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/6300030943.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0434/8238/2502/files/alteryx_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/mutual_commercial_lease_termination_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/tilerigumofeditururizor.pdf
    • https://cdn.shopify.com/s/files/1/0440/2397/2005/files/100_watts_amplifier_circuit_diagram.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197e5.bin
d0aa8deef72061b6c5eae0bd3993682f008cb993918bb08b8a32870a570eb451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197E5 5508 bytes
font_01_sfnt_off0001aa8c.bin
f1e2ca67639785474d879c8c88887773738a026c4667f0fce8ef8b4523a573ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA8C 11944 bytes

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