Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03e453d1a4f0d44…

MALICIOUS

PDF

39.1 KB Created: 2020-08-19 20:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb89f5f22578e41d9ec2d406b99e357b SHA-1: 2b504ff493e1adf72b81828a4b6dbf283ac82832 SHA-256: a03e453d1a4f0d44a82f181ec58fad3b3c5e31c4235c9533a524ecca9c552c5f
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. This indicates the primary intent is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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.
  • 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/pify?keyword=game+toy+defense+fantasy+mod+apk
    • http://bamaruxa.marshamholistictherapy.co.uk/uploads/1/3/1/1/131164250/5702142.pdf
    • http://nepoxof.bellinghamdisciples.org/uploads/1/3/1/6/131637419/revijenuwel_riwepifuwusago_pasirerelezed.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/64158246198.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/jipisojamamuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/46710165042.pdf
    • https://cdn.shopify.com/s/files/1/0436/0057/6669/files/gamowajirika.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/37285523260.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/10558418430.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/89021328057.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_off00005b8c.bin
8e95e5ab80b0c2c1c127fe5bd68a24bda9043787d27ffd00a90f7f7c3c2fa6eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8C 5256 bytes
font_01_sfnt_off00006d81.bin
7546a20ca16cf68ea4310727e2f6dd7e54248a703b9162c4a09549f5760f9572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D81 9956 bytes

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