Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedca38d15e24bae…

MALICIOUS

PDF

78.8 KB Created: 2020-08-03 21:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da132a25ba76a8e0dc5b5f0c48025712 SHA-1: ec42b052cccf586f5c44ce4480fa5df0aa56ff29 SHA-256: bedca38d15e24baed8117a114734248b7700bbe555d7af5d6db70935ad561375
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to attract victims searching for specific document types. The ML classifier also strongly indicated maliciousness.

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=leadership+styles+journal+articles+pdf
    • http://files.hceguhsdaz.org/uploads/1/3/1/3/131383977/9750425.pdf
    • http://files.wheelchairbuddies.com/uploads/1/3/2/6/132682063/2c0eec.pdf
    • http://files.irondesignerchallenge.com/uploads/1/3/1/3/131379398/fafaviziso.pdf
    • http://files.frs.com/uploads/1/3/1/8/131857540/6064547.pdf
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/tedaliwitupapiluramed.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/lewekazexum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/favubedezemopazejive.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/43157083007.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/xutiwuvuwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/stihl_ms170_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/kelujutofegunubumaxiwelon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/paxufad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/rijepejonifarawufexuwujo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9309/files/hayward_pool_pump_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/febejusiloxuxugejax.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_off0000eaae.bin
3caa747f2caa16a4224b26f6ba2786f91bd097041d224abef941b85b8ecddbfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAE 5244 bytes
font_01_sfnt_off0000fc88.bin
b8765e3faf7ab19e78b90242b5e810ae83f757653ec7ea744e2e4cb3d434f6be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 10292 bytes
font_02_sfnt_off00011fa1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA1 4324 bytes

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