Malicious PDF — malware analysis report

Static analysis result for SHA-256 f904e1d5db1cdb26…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 13:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd2cbb2b0c5ff9ff412c0eb34aa464f6 SHA-1: 6cbf0e69e062cbdae6de8b9f923332b3e054b6ea SHA-256: f904e1d5db1cdb26691f7f2e7aca56064bd09951889ecdc5ea07010b0b87479d
140 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting a lure to manipulate search engine results and redirect users to malicious infrastructure. The presence of a QR code lure further supports a phishing or redirection-based attack pattern.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=best+adblock+for+chrome+android
    • http://wamisa.jhigh18.com/uploads/1/3/0/7/130776394/mofajazur.pdf
    • http://files.bendfarmersmarket.com/uploads/1/3/0/7/130776131/nekijusomuzikuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/blade_and_soul_naryu_sanctum_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/22504074176.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/velamumosalotinosupaxolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/92737562165.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/github_readme_images.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/up_b._ed_entrance_exam_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/jigujasebi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/xenaxobenita.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_off00006c8e.bin
cb84d61d03223dfa1a38517b63d7e5943a2719eb1bf0e0af33b91fe893db5f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 5512 bytes
font_01_sfnt_off00007f17.bin
393b230e8e9c419023a681f69b07653aed31554890c17d27da2ef2e271565872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F17 10056 bytes

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