Malicious PDF — malware analysis report

Static analysis result for SHA-256 84bc134487b3e4c0…

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 08:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bbc176abe6e3c87ef04fff525287cfe SHA-1: 8813b8dde9f067930dff873659121791ec0886fc SHA-256: 84bc134487b3e4c0456ec4071406a01ec11f4a22644cb3af7ffdb84d2abdc0a0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/wix?keyword=boot+camp+fitness+class+format'. This URL is presented within the document body, suggesting a social engineering attempt to trick the user into clicking it. The file also contains a PDF link farm heuristic, indicating a large number of external links, likely for SEO manipulation or to obscure the malicious destination. No scripts were extracted from this sample.

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=boot+camp+fitness+class+format
    • https://static.usrfiles.com/ugd/99a8f2_3af30425ba364c1999b9c9bba3f58139.pdf
    • https://static.usrfiles.com/ugd/d775a9_0594625b33c24a9d8f618993ff6a5394.pdf
    • https://static.usrfiles.com/ugd/9cc572_79f00394023a44ea976f12717e118ccd.pdf
    • https://static.usrfiles.com/ugd/529ba0_87278ff260c54c95ba6be175e31b0f44.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/rukefunamavadaluvabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/gapuropibuseme.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/resistance_band_exercises_for_arms.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/64989357489.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9911/files/padakemelise.pdf
    • https://static.usrfiles.com/ugd/defdb4_9ce75107ab274d5b8d963b05d6bef602.pdf
    • https://static.usrfiles.com/ugd/221f3a_b705ee886fa545aa8041a631ba0daeab.pdf
    • https://static.usrfiles.com/ugd/9e14ca_749dc53a5eb548ed86e86364c8dceffb.pdf
    • https://static.usrfiles.com/ugd/f09a9d_a96613b8aae44cc8b9431decc3e97327.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5c2cf93c6d043be8a06f2c6d6083b17.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e274c87c17b4c05b8a8f33dbef06cbe.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_off000068c8.bin
8ac12dd2f4a7da1fe2b5bf3e7a66653a96ec25d2993cd2c091b6f25270aaf5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 5212 bytes
font_01_sfnt_off00007a6c.bin
3533a53b0f86e5d5fce44c27731ad7d33d9b96e0b664bbb9576ac9227f20b938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6C 10124 bytes

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