Malicious PDF — malware analysis report

Static analysis result for SHA-256 01176e822bc88135…

MALICIOUS

PDF

65.5 KB Created: 2020-08-30 17:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 273f8170d90cd5cdd955e92844ea3445 SHA-1: f802234d95902eab14636e79519036ae997464dc SHA-256: 01176e822bc88135a23da3d52239affb0a36f50bc5cb52ab54a5f8fd0c4c9208
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a lure for free music downloads. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=free+download+hip+hop+beatsspotify
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/jesanawusitipererim.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/favarebanejipemojigan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/parulonagilibufovonazinid.pdf
    • https://cdn.shopify.com/s/files/1/0436/8374/1849/files/27686208901.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/savokifavino.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0f6d74d10bc47bdb90ccbb503061549.pdf
    • https://static.usrfiles.com/ugd/d54300_c5c935ceb96445f2a21d92526b8fef13.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e8aeeb0ba9d45d5b5abb91c81bb5f39.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee97749bb1d04e2f90c42d5872c6ea91.pdf
    • https://static.usrfiles.com/ugd/b8c837_b06a2d3d25fc4f509533f5b8e18b48a4.pdf
    • https://static.usrfiles.com/ugd/429b25_482a183b2829491aa134c42619d5831d.pdf
    • https://static.usrfiles.com/ugd/b8c837_65f1f24f46004690bed5ffe0234c6b82.pdf
    • https://static.usrfiles.com/ugd/b8c837_350d0a29eb0c4a69bdebba7ef5a12e24.pdf
    • https://static.usrfiles.com/ugd/aef5b7_d1f2a228e003499bbfcb4f89be67d379.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bec7bd20ef2441ba72da88219e6da27.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cf5844647b943c3976e123e49d235b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_36015bfecebd4de887802a544476f7cb.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_off0000b596.bin
3d754001314f87542f4c9c76659317ca2c9ae70c85d2b412477191a891f8fa8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB596 5204 bytes
font_01_sfnt_off0000c745.bin
2a44d9f9f7d5d5bb6cc68414beba4e42a8404db6c7af21fad1ca3686600547a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC745 10336 bytes
font_02_sfnt_off0000ea76.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 4324 bytes

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