Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3a38a965e5b02f…

MALICIOUS

PDF

51.0 KB Created: 2020-07-28 13:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa3a3d3273ad8f7e69f53f3241664c04 SHA-1: fb06cdda249511d74e5967107c54c5ac0299852f SHA-256: ba3a38a965e5b02faccdad0fe1106226410c7a2b4a5364a3120fba6019bad09e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is disguised as a CV template download. This indicates a likely phishing or malware delivery attempt. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm used for SEO poisoning or to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=cv+template+google+docs+free
    • http://files.wbrental.com/uploads/1/3/1/1/131164132/7103169.pdf
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdf
    • http://files.heddagrevleottesen.com/uploads/1/3/1/8/131856100/xunenulepinef.pdf
    • http://files.usermade.co.uk/uploads/1/3/1/8/131871720/8820630.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/52922760752.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4935/files/golegudemaxek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/38397015531.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/86612408643.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/72353191273.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/91603107348.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/wogokofenilidajop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/bivovonopelodovivixaxur.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/gamawojeguxavomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/92917085528.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_off000089e5.bin
3a5526a6f0b026c1c3aa4cbe808a6f09debeb60f4ff37b78a240cac94cc599eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E5 5192 bytes
font_01_sfnt_off00009b9f.bin
f5271b34b318224405bdee64553bb8a8c29c1e84f8e58e01797f899c773b5db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9F 10260 bytes

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