Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4185e1dfeea6259…

MALICIOUS

PDF

42.4 KB Created: 2020-07-25 06:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9f8cd4554585782abbda18a6715d3c2 SHA-1: 5f4a420698493ddedc4a45661290fa10d403686f SHA-256: c4185e1dfeea62592ef9d5fc2713007e7fa008583a369c2f246b6d6acee7f4f6
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a car seat manual. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly indicates malicious intent.

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=car+seat+safety+1st+manual
    • http://files.neo-terra.org/uploads/1/3/1/6/131637546/5904605.pdf
    • http://files.blackonsilver.lt/uploads/1/3/1/4/131437733/wigaremevekel-bavodivuj-lisazuraru-dasuji.pdf
    • http://files.philly-anywhere.com/uploads/1/3/0/8/130874110/4810952.pdf
    • http://files.bethelagchurch.net/uploads/1/3/0/9/130969065/b1f17453b83367.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/maweviguposeruxekokidal.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/34453240052.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/sesabijekisi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/banozetav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/99863819869.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/febawipivugexazakafuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/49359962917.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/webatawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/wunaxowufekevuxogeso.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/kugarezumaluvob.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/lewidexovuzo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/jisotedag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/zirodirisuzoburo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/23370426217.pdf
    • https://cdn.shopify.com/s/files/1/0431/3959/6454/files/jemiketuradinevi.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_off00006a61.bin
22dfbe46c441d4978023cff99979bea21c087eb5cdb5c735835cbfa32ea8ccf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A61 4812 bytes
font_01_sfnt_off00007aa9.bin
8903f28b64c6cde39b8134663f5f3791c22c748f99586add4a6ccc494df790ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA9 9892 bytes

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