Malicious PDF — malware analysis report

Static analysis result for SHA-256 a182deb81c4c9475…

MALICIOUS

PDF

45.9 KB Created: 2020-08-03 14:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fc884699e1e76c572ec220006647a1c SHA-1: ca24aaecb5e8e701b0014f0bce166354965fcd5b SHA-256: a182deb81c4c94754f8ce4233144cf3c2768d3c41f1e7d8bfc915f7c89588ae9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=trendmile+r%25C3%25BCcksendung+pdf`. The document body, though heavily obfuscated, contains text related to 'Trendmile r\[0xC3\xBC]cksendung pdf', suggesting a lure for package return scams. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for phishing or malware distribution.

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=trendmile+r%25C3%25BCcksendung+pdf
    • http://files.godsunfailingloveministry.com/uploads/1/3/1/4/131408170/6191007.pdf
    • http://files.gesta-goddard.org/uploads/1/3/1/6/131606291/fozezug-powepim-gejojum.pdf
    • http://files.rachelhammermanart.com/uploads/1/3/2/3/132303043/491c98636.pdf
    • http://files.kitsyhooverskincare.com/uploads/1/3/2/6/132696483/605b06b.pdf
    • https://cdn.shopify.com/s/files/1/0434/8028/5348/files/paketebaworel.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/63309008666.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/kelubefewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/16439136050.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/volusaraw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8423/files/53072767784.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/34557692494.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/retutajedodifol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/xazupupilotukejoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/xifowuganufejit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.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_off00005bd7.bin
71835603818ea0244fcd4f8cac801e62af28fe01035ac5d632b07c99169a7d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD7 5396 bytes
font_01_sfnt_off00006dee.bin
83ac5fc4046eda1b7ba5e3faac515f49aa6ad61427ee2931d3ff596726dd88d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 11516 bytes
font_02_sfnt_off00009383.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9383 16092 bytes

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