Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b54bf5494f361f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-20 17:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61a02d97bd339a2ab50b90d7806eebdc SHA-1: 73bfe77791202e513274e503e0ae1edb8daa8fe6 SHA-256: 93b54bf5494f361ff22a4070ce242e743db18ee474b20de47791dc909b7ed723
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign documents. However, one critical link directs to `https://ttraff.ru/pify?keyword=varrock+easy+diary+osrs+guide`, a known malicious redirector. This suggests the document is designed to trick users into clicking the malicious link, likely as part of a phishing or scam campaign. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=varrock+easy+diary+osrs+guide
    • http://files.kytaonline.com/uploads/1/3/1/4/131453291/zezeguwuteva.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/63218074027.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/11141432689.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6370/files/wow_classic_frost_mage_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/67073067154.pdf
    • https://cdn.shopify.com/s/files/1/0436/2744/6435/files/chemistry_notes_for_class_11_chapter_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/48244118379.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/stephen_king_jaunt.pdf
    • https://cdn.shopify.com/s/files/1/0437/3751/4133/files/difexumavo.pdf
    • https://cdn.shopify.com/s/files/1/0451/9664/0407/files/residence_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/29339523392.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/regular_expression_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2728/files/cardioline_ar_600_service_manual.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_off00006ca1.bin
a9eec0494e35b2c2ad456e1113f70729a95cffc27d6dea348841a2522f29f9e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA1 5208 bytes
font_01_sfnt_off00007e6b.bin
b3abaeb9af7e3b3459ae936ec75f362e0f26a1c5e87b2e3b7dd3fe954eaf65b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 10468 bytes

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