Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbadf14ba094f28…

MALICIOUS

PDF

47.4 KB Created: 2020-08-10 21:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b499c283010aaef9b920c828ca88bcce SHA-1: 0412a77816f723e3581fcb6580a335f20fec4cda SHA-256: bcbadf14ba094f283ad471a70747699980667d40a8899e263dcfe2acf9e4bf67
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com, which is used in conjunction with SEO link farming techniques. The document body, though heavily obfuscated, contains text related to 'Lean six sigma yellow belt pdf español' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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=lean+six+sigma+yellow+belt+pdf+espa%25C3%25B1ol
    • http://files.murdermysteryparties.com.au/uploads/1/3/1/1/131164421/c6de335.pdf
    • http://files.wilsonbaseballcamp.com/uploads/1/3/1/6/131636841/bogekipujolu.pdf
    • http://lovoro.esausgunshop.com/uploads/1/3/1/8/131871980/jasuzut_xovoparidatub.pdf
    • http://nanafuga.practicalteacherresearch.com/uploads/1/3/0/7/130740025/dovakiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/charge_blade_combos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/brother_intellifax_2820.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/tasaxoxesepedopebateviwur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/nefirefuzobafejol.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/nemukimatoropedutebod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/pathfinder_bestiary_5_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/febufaderoromenojo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/retazufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/64242570954.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/gubekabuleli.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/characteristics_of_living_and_nonliving_things.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_off000077ab.bin
b18a9de8469b235e57ac4ace8936380a2cfd14b544241f328e94bb75489ff335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 5820 bytes
font_01_sfnt_off00008b49.bin
586e9d795ed4464def42fdeb4f2a8df45d9875ee77da151abfa8697095d3f3a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B49 10352 bytes

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