Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0672010169dc56a…

MALICIOUS

PDF

45.6 KB Created: 2020-08-06 21:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 262c5480c94ff991deb220f5dff3f742 SHA-1: 3fa5ebbcb91fc0dafb6ed449a9e063c813f350cc SHA-256: e0672010169dc56af330f9f46da98c9530ac009e0380662bea96c95618c9aec7
154 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, specifically pointing to 'https://ttraff.com/wb?keyword=flange%20bolt%20size%20chart%20pdf'. This URL is presented within the document body, disguised as a technical document. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=flange%20bolt%20size%20chart%20pdf
    • http://files.christopherrandallnicholson.com/uploads/1/3/0/7/130775046/dubibaxusafe-sebuk.pdf
    • http://files.kreativememoriesphoto.com/uploads/1/3/0/7/130739222/davukasara.pdf
    • http://files.localcraft.net/uploads/1/3/1/0/131071315/jokot.pdf
    • http://files.christopherrandallnich
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/18579585615.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6766/files/peptic_ulcer_diet_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4602/files/18716032060.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/50035563305.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/secret_societies_and_psychological_warfare.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/ffxiv_unidentifiable_shell.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/mugetabano.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/gagisibusuvonozituserab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/76552463033.pdf
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/suvopebivusolakunavizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c6b.bin
cb06266df988248a5efe5a722cf0300a0176ad858fc899efbce4d551374348eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6B 5352 bytes
font_01_sfnt_off00006e8e.bin
7d108956ee84fe310ef0b99d2f77175bf331aa2fcb6b03f1225db82481e8cf7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8E 14616 bytes
font_02_sfnt_off00009b71.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B71 4324 bytes

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