Malicious PDF — malware analysis report

Static analysis result for SHA-256 a404968e1f27aba4…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 07:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f49c28cc597c92c2cfa237c86b75f2ef SHA-1: 71992ae84d2370673969198763145d324ebb2e23 SHA-256: a404968e1f27aba4400f7cebdab0c0b13995c6fb5d9acb6c63c7d5823bc0d7a2
128 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'. The document body, though heavily obfuscated, contains a reference to the same URL and mentions 'china visa application form from pakistan', suggesting a lure to trick users into clicking the malicious link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=china+visa+application+form+from+pakistan
    • http://files.siyaozheng.com/uploads/1/3/1/3/131382395/mupiwoxe.pdf
    • http://pulotes.bestdealfitness.com/uploads/1/3/0/7/130775448/e79dae13.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/84025150943.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/unix_shell_programming_tutorials_point.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/jelidoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/47646381859.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/74982158961.pdf
    • https://cdn.shopify.com/s/files/1/0431/3704/0538/files/psychology_of_love_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/vijapijavozobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/37318483912.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/wuferurava.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_off00006096.bin
8a79132061e81b5ca561a6fc62e033adfb3cd19545846a419ab77c39562270f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6096 5284 bytes
font_01_sfnt_off00007263.bin
3eb5429d2ea84b70d370661d57f98cd48f98932d72e49cac54362bccbfae8b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10308 bytes

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