Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c74ad0e4620f0da…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 06:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 457f9302e53b23ddfcdc820b225e937b SHA-1: 4fef29ff966279d8b2143dbeb245b20211412c58 SHA-256: 1c74ad0e4620f0daad06a4d5062badbd5fd4471d690328658c7e03f2a7802b7f
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service known to host malicious content. The document body text explicitly mentions 'Latest version of telegram free' and includes a URL that leads to a redirector. This suggests a social engineering tactic to trick users into downloading potentially malicious software or visiting compromised sites. The PDF also contains numerous links to Shopify-hosted PDFs, likely part of an SEO link farm to improve search engine ranking for malicious content.

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=latest+version+of+telegram+free
    • http://butirite.shopgoldgray.com/uploads/1/3/1/6/131606289/govitoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0261/7252/files/char_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/yamaha_moto_4_250_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/cambridge_igcse_chemistry_coursebook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/advantages_of_case_study_research_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/secretarial_abilities_books_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/21661685443.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/isometric_piping_drawing_in_autocad.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/placenta_previa_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0433/9364/6753/files/41953597679.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/gadutopomokuwelimitezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/berdirinya_dinasti_abbasiyah.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/71739673565.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4542/files/abstract_algebra_questions_and_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_off000066f4.bin
b11d8f68c945eec4e1cea8af71f0a36f3f50579ae6bc16745fabcfca66d5fbf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 5088 bytes
font_01_sfnt_off0000783b.bin
84b7c2c0d982e700204ada60751368e37ebcf541b5f15d3c6b3f55217109023f
pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 10140 bytes