Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f98097580d22287…

MALICIOUS

PDF

41.6 KB Created: 2020-08-13 18:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf1d9d761c8a7f4fec225e81e9e47206 SHA-1: b6495f7f688ff4b92567d3ef4eb7823c095b053b SHA-256: 1f98097580d222874291643d6923a32578037782dce8fb1ee7ca063c472eab27
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the text 'Kitchen tools and equipment worksheet' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a malicious redirector link is the primary indicator of malicious intent.

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.cc/wb?keyword=kitchen%20tools%20and%20equipment%20worksheet
    • http://files.equineexposure.ca/uploads/1/3/1/4/131452735/gaxunesigo.pdf
    • http://files.hungerandthirsttheatre.com/uploads/1/3/0/9/130969437/bufadujaxifamo-milusukab.pdf
    • http://files.abrenian.com/uploads/1/3/0/7/130775759/vekusiro.pdf
    • http://files.southaiken.org/uploads/1/3/1/0/131070576/729970.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/2436923830.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/beginner_english_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/baluta_daya_pawar.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/bemakezenulumirasamawur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/67633388062.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/talozomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/attention_charlie_puth_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/duvojujebuvimemejafuju.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/gikewagupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/lisupo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9689/7704/files/rujifedudiwa.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_off00006030.bin
207176d2778229e758bca3106dba826ea72e4349a5be9c6761cfc2bec850045b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6030 5564 bytes
font_01_sfnt_off000072ef.bin
f87ac0cb5b6d55cda9995aebb8df695f2edfcef6e695afe4f844940d08bd8131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EF 10784 bytes

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