Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d4651ea6cf1606…

MALICIOUS

PDF

44.3 KB Created: 2020-08-06 22:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44512d26798bd78aa8af104dae606d3 SHA-1: 346686e1439a47cc31c471c3f2331b1a0b70ba44 SHA-256: b2d4651ea6cf1606be45e4712fdf7b08ead2a6337658c9e25a82606a20037c7f
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 of which point to a link farm hosted on Shopify. One prominent link redirects to a malicious URL on 'ttraff.com', suggesting a phishing or redirection attempt. 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=understandable+statistics+9th+edition+solutions+pdf
    • http://files.merraephotography.com/uploads/1/3/2/3/132303151/5036752.pdf
    • http://files.dianefelicejewelry.com/uploads/1/3/1/4/131453146/siburekerurazi.pdf
    • http://files.flcleavenworth.com/uploads/1/3/2/7/132711966/dozunafida_lawiro.pdf
    • http://files.lyc.ca/uploads/1/3/1/3/131379296/9432139.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/selibarugumigokinaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/87163127102.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0647/files/rosa_parks_outkast_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/vermeer_sc252_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/elements_of_econometrics_kmenta.pdf
    • https://cdn.shopify.com/s/files/1/0437/8604/3541/files/lunitefexifiju.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/40818414887.pdf
    • https://cdn.shopify.com/s/files/1/0435/3002/7157/files/49689113116.pdf
    • https://cdn.shopify.com/s/files/1/0445/4989/8399/files/alberta_rental_agreement_forms.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/42479793632.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/peliruwexofukejumupile.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/gekekuresil.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_off00006c94.bin
29356a7cfb8af405b988a84aa2b7ee8841a0e6f5d1444fbf849127d5791af4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C94 5528 bytes
font_01_sfnt_off00007f53.bin
71f83c499f79d52f578a3bf1859212c5a36ef06daae155def2f87f0d0e76167f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F53 10820 bytes

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