Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e21a668984be3d…

MALICIOUS

PDF

48.2 KB Created: 2020-08-29 18:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb7cff5dd15535bd0f17a22dc71d0c2 SHA-1: b50d957d48c7fc640ec6c5d0d252046a4a2f1bc4 SHA-256: c8e21a668984be3d492dc73bf8dd7a5d442b1ed85a6c99c9ebfb6b807cfeea78
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=simyac%2525C4%2525B1+pdf+kitap+indir'. This URL is presented within the document body, disguised as a PDF book download. The presence of a large number of external links, many pointing to benign content, suggests a link farm SEO tactic to obscure the malicious redirect. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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=simyac%2525C4%2525B1+pdf+kitap+indir
    • https://static.usrfiles.com/ugd/b8c837_c59dde0f4c0644d98e617d6170bb45ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_955a13aea1074fa1b367fd6c49cbe768.pdf
    • https://static.usrfiles.com/ugd/0a593f_9350a3a310384b66b4860ed182034f11.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2185ba3afda4099aaefaab0fd0320ce.pdf
    • https://static.usrfiles.com/ugd/d43733_32e0a62f5dae4d21a0e5e7cc4697702f.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/8226989230.pdf
    • https://cdn.shopify.com/s/files/1/0440/6935/5670/files/66853334379.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/gonk_or_paku.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3435/files/xubixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/57528327050.pdf
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/garcia_jeans_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/9724406733.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_fc17db435ede4f47b651d3f260971cfc.pdf
    • https://static.usrfiles.com/ugd/10b11f_7bacbd32d22f492f8bb8a64f1830b7ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ac67685347c418a8d01357a5a585f4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e0839b1a2534d9abba6fd66bce1cfb6.pdf
    • https://static.usrfiles.com/ugd/a76634_e1a4b63c2d9f4ecc8247d382ace017c5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070dc.bin
0c8ce3cca3cd5a0837b91c9b38a9e9285790071a63d1497c332001f416d51419
pdf-font-stream PDF embedded font (sfnt) at offset 0x70DC 4952 bytes
font_01_sfnt_off0000819c.bin
fc31246ec9ab9f8cfec7a6ea26a4d046bedd86c8394074d9aad1e913fea7c314
pdf-font-stream PDF embedded font (sfnt) at offset 0x819C 10120 bytes
font_02_sfnt_off0000a44a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA44A 4324 bytes