Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f638d27e5b255a…

MALICIOUS

PDF

42.7 KB Created: 2020-08-14 23:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec8d8e165ccd786d7365493d1429e24 SHA-1: a18d9fce2481f10ea4744098fc6a6a5bd2ac89d6 SHA-256: d2f638d27e5b255abd336148d35876711d5918bab513ebeac29c52e866234c2b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=chrome.+exe+latest+version+free'. This indicates an attempt to trick users into downloading a file by disguising it as a free software utility. The document also contains a mass external PDF link farm, further supporting a lure-based attack pattern. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

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.com/pify?keyword=chrome.+exe+latest+version+free
    • http://files.sarahmawa.com/uploads/1/3/2/7/132741555/4725946.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/pdf_file_editor_apk_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/pdf_to_word_converter_free_software_offline.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/nextbook_ares_8_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/landscaping_and_ornamental_horticulture.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/dorebuna.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/38140124426.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/22805348114.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/63833691042.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.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_off00006ae6.bin
b6f7218f60c350b0809371e3c03113c5a1e11ad2f52fe3b3eb0f99b083403fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE6 5072 bytes
font_01_sfnt_off00007c0b.bin
640908d11ee125331cd7e918fcbb5b2f1c3ee75fc432276015e0dcdc8a9fb216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0B 10080 bytes

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