Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bd321bc835e3e2…

MALICIOUS

PDF

45.5 KB Created: 2020-08-26 10:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ef73d7f4c1d84706931f19ad227083c SHA-1: 26cb910b2a16f1f814da192bc09fc5403fb6c085 SHA-256: f5bd321bc835e3e2f25b0aa36c890beb83911585dbf474009c9d650d7b1f3529
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru, which is used in conjunction with a PDF SEO link farm. The document body, though heavily obfuscated, contains the string 'Drivereasy key numaras' and the malicious URL, suggesting a lure for software cracks or keygens. The numerous embedded links, many pointing to Shopify domains, are likely part of a 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=drivereasy+key+numaras%25C4%25B1
    • http://files.paternosterproductions.org/uploads/1/3/2/6/132681647/1132609.pdf
    • http://fesemo.carolchallis.com/uploads/1/3/2/7/132710575/nanugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/is_subnautica_a_horror_game.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/70931224741.pdf
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/fuwev.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/sodium_chloride_certificate_of_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/case_files_general_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0443/1478/7996/files/anganwadi_form_download_mp.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/depafopamix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/modafite.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/62713114313.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3429/files/37980488528.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/bodbot_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/86171795964.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/40296313748.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_off00006a9b.bin
e6a92d8430701e44e8e63e5ef146269c56d781838ff64554e8a7de3f97362176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9B 5056 bytes
font_01_sfnt_off00007bcc.bin
07ab780dc557442438a4e6cdddc4daf3010aac7565643642494c622e1c09066c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCC 14060 bytes

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