Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fdcfeb1b38a4a4…

MALICIOUS

PDF

42.7 KB Created: 2020-09-11 05:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d57773550acb71065aa608c28d85802 SHA-1: 0375b06aeaf3904aa870187ae3686a29baa0b85b SHA-256: 14fdcfeb1b38a4a4b35f89dd5c192f84621d419abcb2ab963626a05d9c597fe8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, many pointing to external PDF files, which is indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.club/wix?keyword=centre+align+form+in+html'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to manipulate search engine results or to distribute further malicious content.

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.club/wix?keyword=centre+align+form+in+html
    • http://files.hurliherzistan.com/uploads/1/3/1/3/131379382/5327556.pdf
    • http://files.albertawildapparel.ca/uploads/1/3/0/9/130969322/pisuxutuna.pdf
    • http://files.iwill.us/uploads/1/3/2/7/132712034/1166092.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/17377910747.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/31504597202.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/zotazojazedumasenoxeti.pdf
    • https://static.usrfiles.com/ugd/d99ef3_c4aa8ea8204241bbb750a88acdf646f7.pdf
    • https://static.usrfiles.com/ugd/b50c55_d014afccfb2241629094c4a1c977eeb5.pdf
    • https://static.usrfiles.com/ugd/e6e573_3e96da4da2584109b7c781f9f1d6b86e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e24.bin
570efda1b2a466f4c995805ed0b9b130cf50224377df8793806f98b5decce155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E24 4908 bytes
font_01_sfnt_off00006ea8.bin
4380706f8979788ab9990746f45ccf800bd785d1dbeb3355caa824299bd74390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 15352 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.