Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf70d55a5754425…

MALICIOUS

PDF

43.1 KB Created: 2020-08-04 17:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017d984112cf21f19466696c2be8f269 SHA-1: 5b71d8e920e95263e82950123a838dbf7dd1995f SHA-256: baf70d55a575442525ef811fffe63d89faa2a1936ef391b00a1a1cb1b1c505df
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=probability+distribution+example+and+solution+pdf'. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect the user to malicious infrastructure. 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.com/pify?keyword=probability+distribution+example+and+solution+pdf
    • http://files.mettertigercheer.com/uploads/1/3/1/1/131164473/xoduvur-bezilakejo-zudike-tutiba.pdf
    • http://files.huucsb.org/uploads/1/3/0/7/130776393/3665222.pdf
    • http://files.branchingtogether.com/uploads/1/3/1/3/131384171/vuterewusebob.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/63053704159.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/35417343816.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/dovawikeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/75011088731.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/mupenimozar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/mifegetuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/zinunoxusewur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/mort_myre_fungus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/54546309418.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8005/files/70678639711.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/sujagesabedufixag.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_off000068cf.bin
8d8f76b8180b380ec94639be43e78055db7bdad3fda485b8098c20bf6625408d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CF 5496 bytes
font_01_sfnt_off00007b6f.bin
62ff8a42ea4abd76928d380b619596143a44d5222ea64ef1ff1842c4e0e5d8a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6F 10476 bytes

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