Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e8302c4dcd882b…

MALICIOUS

PDF

53.4 KB Created: 2020-08-20 18:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bac30ce6b5621878a64dab47327a36cb SHA-1: 336c02cafa9939a84f17eba89b543b0569761e98 SHA-256: 05e8302c4dcd882bad6b6038054d7e8fa86a7cebb78ae9affbff5953fb720fe0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. The primary malicious URL identified is ttraff.ru, which is used to redirect users to other potentially malicious sites.

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=adventure+hollywood+movies+in+tamil
    • http://vaguju.laura-walters.com/uploads/1/3/1/0/131071164/talirovimonukumeni.pdf
    • http://files.goldenpearlproperties.org/uploads/1/3/1/3/131398036/6ed3b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/2944406645.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/22185319822.pdf
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/faithful_victory_worship_chords.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/65967325283.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/stevens_320_12_gauge.pdf
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/74303861363.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/37549899153.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/bomomikivinalubokisamegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/domekobufer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/59748171502.pdf
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/base_level_of_erosion.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/kakikesafubigatukiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/5373/4298/files/spider_man_homecoming_ps4_game.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000937d.bin
64c22dd92317710bb3e92a56f67481c05137647fe9c4117a4086e8f267bf5fb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x937D 5308 bytes
font_01_sfnt_off0000a56e.bin
7f4de8bf393a0409c87d3b5b4062bb8d87fb19867ae6acc5bed9ecbeb28f8a3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA56E 10292 bytes