Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f55f908c618f7cb…

MALICIOUS

PDF

49.0 KB Created: 2020-08-19 11:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab6bcd7b7294ab801ea89edf8d33215 SHA-1: 46df9e2e757ba9957d8124ba52d73a5c98e52126 SHA-256: 1f55f908c618f7cbe57abd2d6cf6fba0e2c8304cd6dc74dea8569feee45c04f3
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a large number of embedded PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to the 'ttraff.com' URL.

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.com/pify?keyword=boat+conformation+of+cyclohexane
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://puvoki.bobwang1991.com/uploads/1/3/1/4/131407995/tuxasozezunigu.pdf
    • http://files.lolswampfest.com/uploads/1/3/1/8/131871605/fibibewulavafeb-lotenoxal-simolipomu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1895/9523/files/lifatunenaperewetalufimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/que_son_las_actitudes_y_aptitudes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/30050633627.pdf
    • https://cdn.shopify.com/s/files/1/0440/3222/9541/files/bourne_shell_scripting_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/88200917080.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/sugadisesarosotewuziz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/79945945723.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/didurapaxebotivabox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6175/files/18032449957.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_off0000829d.bin
d5b8f8d1e0985f5b926ed01a7883c9af682560565051cbfb87887b84264afc74
pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 5160 bytes
font_01_sfnt_off00009407.bin
9d144aff3ca9f18973893b7da2478f0f2cfa4b6c81c08ec1e21147e7a7a8430e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9407 10240 bytes