Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a0a463422f20a2…

MALICIOUS

PDF

37.6 KB Created: 2020-08-31 03:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a60dd78ddd435091c90a0ebd9e375796 SHA-1: 524bdf525a3875d474a1dcd9b9cb1ee08b199cb2 SHA-256: 76a0a463422f20a234ab86711f7b87bbf7eda40160dcb66662e87a82f174e00c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains references to the same URL and other benign-looking PDF links, suggesting a lure to a malicious site. The presence of a malicious redirector link and the ML classifier firing strongly indicate malicious intent, likely for phishing or malware delivery.

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/wix?keyword=pathfinder+roleplaying+game%253A+villain
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/reguzepenili.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/nissan_almera_tino_haynes_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/autarchia_fascismo.pdf
    • https://static.usrfiles.com/ugd/b8c837_83408f72035d4856865fce5046171f54.pdf
    • https://static.usrfiles.com/ugd/b8c837_45d127f7681548068b15fb56c7872518.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd5105def9649e1a620f65a4156f451.pdf
    • https://static.usrfiles.com/ugd/9374a7_e24afcca12ca4b1ca917dab99d64ae3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9757a9fd410f454e90d91bf7c36e36fc.pdf
    • https://static.usrfiles.com/ugd/4c1554_0ea7df25100e40309332ceed4beb9396.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_88659716fb544ababbe572328b2d8a33.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004992.bin
2df4d85c991ca4998404bd485b92d729df6e4ad3166a6f8e36e252d287f14734
pdf-font-stream PDF embedded font (sfnt) at offset 0x4992 5280 bytes
font_01_sfnt_off00005b5d.bin
5fe38c4a027e987f4538df45a774cef4a91539e10ff117a8f9db1d759b4a6f1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5D 9432 bytes
font_02_sfnt_off00007bb2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB2 4324 bytes