Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e140af168cf980d…

MALICIOUS

PDF

49.4 KB Created: 2020-07-27 05:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3f041c33053a53f32f5c42788382dc8 SHA-1: 81da56df8fff325601d5a9fc4ff0b51a29bb8fe0 SHA-256: 7e140af168cf980df2a0edefd0418014a9581cd0f41f5eba5f4cbdc110ee7946
154 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to an 'imperialism study guide pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content. No scripts were extracted from this sample.

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/pify?keyword=imperialism+study+guide+pdf
    • http://files.emmaunderwood.co.uk/uploads/1/3/1/4/131453355/4c5f9.pdf
    • http://files.communitygospelnj.com/uploads/1/3/1/6/131636852/zexelawagabodo_bazovuves.pdf
    • http://files.jeremy-proulx.com/uploads/1/3/0/7/130775197/b79ec8863a42.pdf
    • http://files.imadocshighsign.com/uploads/1/3/0/9/130969411/jubozovipatuwi.pdf
    • http://files.mazarchery.com/uploads/1/3/2/8/132815872/46b0c6.pdf
    • http://files.imado
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/65438354625.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vewurobafug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/28595837558.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/govop.pdf
    • https://cdn.shopify.com/s/files/1/0430/1360/3491/files/28588658983.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/86677737453.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/fuwidawujawegadomalit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/16391866020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/senajetewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2471/8746/files/kuvivajegefazepatovaxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007415.bin
1f5f96c861a6c6b698a64cb710daf27d01275a037967de36479756decf3a8e6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7415 5064 bytes
font_01_sfnt_off00008543.bin
653f61f74aa9e8a729509f02b4b720bc6c04a82a34011ebeaf49bc12578a6f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8543 4064 bytes
font_02_sfnt_off000093d6.bin
29e74f01ef1b5fd134beac7e425eccda592b628c9b692f7ee6970a60250924a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D6 10156 bytes

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