Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ecf1dc4c8f260c…

MALICIOUS

PDF

34.9 KB Created: 2020-08-20 10:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57e6f1068ac4e08ab284acdcae5df474 SHA-1: d1c68bb50d6252e42ce3a33f8b88b4aab21fd5b4 SHA-256: f7ecf1dc4c8f260c4484a678a0b46bc03675092e39b2aad0c2f5f536b6123326
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious link points to a redirector on 'ttraff.ru'. While the document body is heavily obfuscated, the presence of numerous external links, including one to a known malicious redirector, strongly suggests a malicious intent, likely related to SEO manipulation or redirecting users to harmful sites. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=lip+sync+reference+sheet
    • http://rugegumev.andreabridgephotography.com/uploads/1/3/1/4/131453329/gavimaxezutugeb_ritow_dixabasuvije_fefakizago.pdf
    • http://files.redhawktheaterbc.com/uploads/1/3/0/7/130775623/9429444.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2916/files/xelimafipepip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5719/2865/files/4k_video_downloader_not_parsing.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/epic_war_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/gefivujigivilixiwalagoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/nefarubuputonom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/cours_grammaire_espagnol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/ap_biology_chapter_41_reading_guide_answers.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_off00004af1.bin
282abc838305c07b9089bd62af4f005cc14aec453c0733ede0b008d4447b6c9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF1 4904 bytes
font_01_sfnt_off00005b9f.bin
d2284a0d37f8914135ee9c23a84434e2ed860f21e6e335c4b2ee98e4f6403fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9F 10436 bytes

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