Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9845538e2e47932…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 21:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da59f5c62ed3202bbd33c77d1f2728a0 SHA-1: ce8f962f51e7278bec9cade03ff9d4b5fbcb97ec SHA-256: e9845538e2e4793265afaa1f2c64224bfabbadbe8143a51445a9c71bb11598e0
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The presence of a large number of external links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute 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.cc/pify?keyword=unexamined+life+is+not+worth+living+pdf
    • http://xovaz.rippintimber.com/uploads/1/3/0/8/130873851/1304801.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83300066175.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/lesuzumewuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/ffxiv_hide_ui_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/tipurenuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/tipitasixuzesumegapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/funcionamiento_de_la_bobina_de_tesla.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/73367976449.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/25955961118.pdf
    • https://cdn.shopify.com/s/files/1/0430/2697/2825/files/25279537860.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_off00005b58.bin
be97cfe7544ef526cd32b38490b10876e4c890bd5071d3ddf74ee822f24df41f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B58 5664 bytes
font_01_sfnt_off00006e93.bin
66257958e44b6e0e7b384dac3056894e14821d3bc75d308bf5134e1744ee55ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 13364 bytes

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