Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ee6a5b6c350a62…

MALICIOUS

PDF

70.0 KB Created: 2020-08-20 12:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaae4c580b336d583788d60af7db9a56 SHA-1: c3db9d539844ffd01e28423f2746a1b426b5d8c7 SHA-256: f0ee6a5b6c350a6200bec1d3b00e19655ebb9fa7cc5fca84e2c71ccf0914277d
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a primary link to a redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Mentalist episodes guide' and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous Shopify links indicates a link farm for SEO poisoning or traffic redirection. The primary malicious URL is 'https://ttraff.ru/pify?keyword=mentalist+episodes+guide'.

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=mentalist+episodes+guide
    • http://fureki.kawarthatruthandreconciliation.ca/uploads/1/3/0/8/130874330/pedexasadowob.pdf
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/bidizezibajilazudakix.pdf
    • https://cdn.shopify.com/s/files/1/0443/5096/3868/files/bakrid_movie_songs_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1373/files/jonekipukewuminajidewed.pdf
    • https://cdn.shopify.com/s/files/1/0434/9178/6918/files/7872852105.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/comparison_of_clustering_algorithms_in_data_mining.pdf
    • https://cdn.shopify.com/s/files/1/0451/5728/6042/files/socioeconomic_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/werewolf_board_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/gegekogijudut.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/easy_jazz_piano_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/kuxubov.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_off0000c7c3.bin
53c3dbf2a6acb2793f410ea0870ffb050bcf5c32cb3968e51f843744a62721ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C3 5036 bytes
font_01_sfnt_off0000d8fd.bin
8013188b484577d0228cc28fa9aea0fbd5324eeef188b313ad69af67ee1e1987
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FD 16436 bytes