Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e574af8c00264a…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 13:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e35512469d73ea24fab4e301ab45efc0 SHA-1: 6e79811773c3be445351c86520e58d3b245f269c SHA-256: 89e574af8c00264ab4ff167f9e4aecf0ac8c79ba770478ffdc41fc7079566367
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a Cisco Webex Room 55 manual. This link leads to a link farm hosted on cdn.shopify.com, which in turn likely serves further malicious content. The ML classifier strongly indicates malicious intent. The primary attack vector is social engineering through a deceptive document.

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/pify?keyword=cisco+webex+room+55+manual
    • http://vudafite.daniellewisarchitect.com/uploads/1/3/1/1/131164250/cf72b48.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3281/files/craftsman_gt_5000.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3883/files/gotufiwopevokaloris.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/92134850541.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/free_monthly_budget_planner.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/kopaledoloxanejururide.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/zufopugesawanaxopar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/30524075559.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/sipebamedikif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/el_breviario_de_alarico.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/7617544558.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1079/files/68955653459.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_off000069d7.bin
e9752dd016a6dcd0163c34a1532015cedbb410f3d759b00d65b03cde99abb4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 5272 bytes
font_01_sfnt_off00007bc1.bin
0b1ee089bb0ce00a2626bfb172a20d5023d89fcdeed3e374e1f7eb3505552abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 11008 bytes

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