Malicious PDF — malware analysis report

Static analysis result for SHA-256 3887eece78289a5f…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 07:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 997cfa8aca252d8640e180db036703bc SHA-1: d4e5a7cd6c77591f71bb2a2e4132d62ec2f21ab0 SHA-256: 3887eece78289a5fb5c4aeaffcefa8dc5e9ab920073f3d4fe595a7f26d6bd09c
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.com, disguised as a PDF editor tool. The document body, though heavily obfuscated, contains the same URL. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly indicated 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.com/pify?keyword=pdf+editor+extract+pages
    • http://files.stefiecakesandtreats.com/uploads/1/3/1/3/131380042/takewewusemerepasub.pdf
    • http://files.campatgalilee.org/uploads/1/3/0/9/130968937/6141e655971c2c.pdf
    • http://files.aoassociates.co.uk/uploads/1/3/0/7/130775475/pijujid-lididatule-pujomefodimifot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/sojoritedamadegexusuxiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/32811938505.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1884/files/lovewolalixow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/juxidurabosudum.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/fafaxefadixomubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/79637041514.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/fezelawetukel.pdf
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/90285574775.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/9450451843.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/rac_breakdown_cover_uk_policy_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/82315394234.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/ssh_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/sin_cara_mask.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/newikikexerewuf.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_off0000621f.bin
6ee815a23a44df760260abff723a1a03f2d3755922a389aadae3382fa845105a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 5360 bytes
font_01_sfnt_off00007476.bin
74f8d414fcad587400d23e949852cd177de45a915761fb966fcc5b3de7714222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7476 10016 bytes

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