Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d9c58061c04aa2…

MALICIOUS

PDF

115.4 KB Created: 2020-08-12 13:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6d5363cb5bd9f38e0f4302c0486da6c SHA-1: 934e7ba66c859262dbdefa4ebc91ee2aa6441a5d SHA-256: 29d9c58061c04aa2701ecd5427efe789d24dfe54b8bc237c966194b17e936ae4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'determinism philosophy pdf' and includes the malicious URL. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it's a redirector and part of a link farm.

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.com/wb?keyword=determinism%20philosophy%20pdf
    • http://labumol.thealevan.co.uk/uploads/1/3/0/8/130813765/mupiza-misupalamosi-tudoxo.pdf
    • http://lotolo.spaceairforce.us/uploads/1/3/1/3/131378814/rulibemejaradifipe.pdf
    • http://bavos.ppindependent.net/uploads/1/3/1/4/131482975/neseze.pdf
    • http://files.signsanddesignsbysabrina.com/uploads/1/3/0/9/130969080/9458044.pdf
    • http://files.grumruns.com/uploads/1/3/1/3/131384249/81d8cef21a7fc.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/bezolon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/gujavetegoto.pdf
    • https://cdn.shopify.com/s/files/1/0430/6980/0597/files/36844855888.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/73344159204.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5222/files/zorelatilokuneda.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/wedumariwalarivum.pdf
    • https://cdn.shopify.com/s/files/1/0452/6351/9906/files/jorge_basadre_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/80024091802.pdf
    • https://cdn.shopify.com/s/files/1/0434/9594/8454/files/28049979560.pdf
    • https://cdn.shopify.com/s/files/1/0429/8371/9071/files/darth_plagueis_livro_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/zakafakirera.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/36837681237.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016377.bin
379102226829f3bab3a3c763e92e857047a50d0750f2cd7a3c42e86eaecd7746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16377 2912 bytes
font_01_sfnt_off00016ddb.bin
4a7d1ccb6021c2f854cd4c36b7467151006a85cdd85dd6989e95175f50185080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16DDB 5172 bytes
font_02_sfnt_off00017f4b.bin
e0a5c22dbaf67dc6904cc70a93828b9c9a16db0c56aaee2c9541fcc7675b0c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4B 11920 bytes
font_03_sfnt_off0001a806.bin
12c0df846059c0cb00026c270b37344a0dc3e7565ec411f5fcaa0e1a8c8da945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A806 16684 bytes

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