Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0f1c80dcb6638d…

MALICIOUS

PDF

32.6 KB Created: 2020-08-31 10:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e13f65d6fd473c0b8f5546e6ebfebf7 SHA-1: 0e9e53f3a0d12a52a2afcae259f060aff74e92a3 SHA-256: ff0f1c80dcb6638d45e664ff9d2b0ad3f7ced229d31082e589bb9d28d14a7fe5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic.

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/wix?keyword=cincinnati+time+clock+manual
    • https://cdn.shopify.com/s/files/1/0431/0535/3889/files/60940818408.pdf
    • https://cdn.shopify.com/s/files/1/0438/0701/5069/files/15078550782.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/autonics_tcn4s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/jolikalabopovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7317/files/eso_magicka_dual_wield.pdf
    • https://cdn.shopify.com/s/files/1/0438/0200/1570/files/fatulibakiwedemuxawek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8053/8529/files/basedenagoramarijojud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/tab_delimited_text_file.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/11720033139.pdf
    • https://static.usrfiles.com/ugd/9e53d4_933e8fa9357c4827b426d40ad206eed9.pdf
    • https://static.usrfiles.com/ugd/bf0735_05d88cca0c1d48f2a64397b54889c95b.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_off000044d2.bin
f0063c0aa7e4338ab9f3fecaedc5d68c60dffc17149699d7a6dc44165cfe5d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44D2 4640 bytes
font_01_sfnt_off0000547b.bin
508917d93884e77ae94c51b47a556e97be55e1dbac6b70b083b59178ff8404aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547B 9760 bytes

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