Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d048647cff48912…

MALICIOUS

PDF

124.0 KB Created: 2020-08-05 03:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f234bf3f2d1405e92474f23c299c4865 SHA-1: 0fdfcc7dec49732a76bb8aa9ab673fa038ef8134 SHA-256: 3d048647cff4891291acb49e98af7847b081498da2497e2c4083c1a168b3499f
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'algorithm program pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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=algorithm+program+pdf
    • http://files.thehammerandanvil.com/uploads/1/3/1/1/131163666/fopejot.pdf
    • http://files.lynnvalleyturnings.com/uploads/1/3/1/1/131163836/menekezozi_dinij.pdf
    • http://xupiwibat.li-xiaolu.com/uploads/1/3/0/8/130874218/1988744.pdf
    • http://files.babattingcages.com/uploads/1/3/2/6/132681985/fevebi.pdf
    • http://files.homeworshipping.com/uploads/1/3/2/7/132740692/bewujajekenotujuzes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/jebatafugom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/tivoxivotuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/haynes_versus_chilton.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/jadivolopu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/drop_g_tuning.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/xekitagawizaseka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/jntuh_b_pharmacy_syllabus_r17.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/15256343007.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/tafewukudisefona.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_off000180d1.bin
94bad7089ee263fade8045625576d092753fb883e7578f5423a3520458dbe2be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180D1 5264 bytes
font_01_sfnt_off0001928f.bin
63ccc5dabe0441dd3630631f3103e64a18f3fc686d80758fdf47c38fc4608b17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1928F 17256 bytes
font_02_sfnt_off0001c83c.bin
f77768241885f773a744f3c0d7d2bf5232fcf2f30c6c7418e5b00782b4ceb44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C83C 16884 bytes

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