Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a096cc85327720…

MALICIOUS

PDF

49.6 KB Created: 2020-08-20 11:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ad559726c32962f0c17ac1a7437790 SHA-1: e62d9d2053a253895f0d095c01131b138e6a4883 SHA-256: e1a096cc85327720753204eb52a7cdd5c10c92c4fe5615f1f569e4d60d7f13bf
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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=catalytic+reforming+reactor
    • http://zuzodar.paperfigments.com/uploads/1/3/1/4/131452988/6832937.pdf
    • http://files.andersoncountygop.org/uploads/1/3/1/3/131384721/nosopux.pdf
    • http://files.sunlandservice.com/uploads/1/3/0/7/130740069/af6db4d.pdf
    • http://files.letsdialogue.org/uploads/1/3/0/7/130775974/9174049.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/11791271137.pdf
    • https://cdn.shopify.com/s/files/1/0447/8337/0397/files/86454864659.pdf
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/vibumom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/pusewizubutekipumuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/misoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/zotemodixubitowemigaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/download_ios_9._3._2.pdf
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/45282530016.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/98000178676.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/71858290632.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/delepepesa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/clicker_heroes_latest_version_hacked.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_off000085db.bin
ad5e968462a77509519d8f102c675eb8942b52dccaf456c13139e85b60536689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DB 5028 bytes
font_01_sfnt_off000096ea.bin
82adff4574f1324b6d2944bc7d6888d6e5f044d33f3089c3e12d61df2cabd23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96EA 10168 bytes

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