Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f0b488e350414a…

MALICIOUS

PDF

65.8 KB Created: 2020-07-21 03:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb35a1898acf75d5bd95e6733b5f8a44 SHA-1: 5f5ca2550b869ec1bc0f58bfbd55890f077d7ac3 SHA-256: 30f0b488e350414af9f7678c770d43a5abb5cfe212d214d2e76bb14a08b73a89
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This indicates an attempt to direct users to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous external PDF links further supports a link-farming or redirection attack pattern. No scripts were extracted from this sample.

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/wb?keyword=cross%20border%20investment%20pdf
    • http://files.susanhandelman.com/uploads/1/3/0/8/130813526/fafonifolofezerara.pdf
    • http://files.clovercreekaerodrome.net/uploads/1/3/2/3/132302999/gesuzupixup.pdf
    • http://files.billstrom.ca/uploads/1/3/1/0/131069819/mowojudalav.pdf
    • http://files.atec-rental.com/uploads/1/3/1/3/131379111/188760.pdf
    • http://files.myshopeclectic.com/uploads/1/3/1/4/131483778/3611258.pdf
    • https://cdn.shopify.com/s/files/1/0436/8033/3989/files/78489731438.pdf
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/50419272866.pdf
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/87217577248.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://venubaruxak.files.wordpress.com/2020/07/66655163527.pdf
    • https://debinarow.files.wordpress.com/2020/07/95556272058.pdf
    • https://jekiwex.files.wordpress.com/2020/06/23000846136.pdf
    • https://pavuzuro.files.wordpress.com/2020/06/dedixe.pdf
    • https://lisebuvuwe.files.wordpress.com/2020/07/bonakaperereje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/8580774413.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/33396534148.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/xitosorimuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/53025308122.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/98680644091.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/99368521327.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/25045885659.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_off0000c4b3.bin
b901d3a751ba8f5c8efc81192bda87458544703ae7be9d01fc883a04edf5149f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B3 4956 bytes
font_01_sfnt_off0000d576.bin
cf31bc64df3583b48489b0411985f398464380b6dbe78a7838e7a4640225aab9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 10716 bytes