Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b225f187dc4228…

MALICIOUS

PDF

44.6 KB Created: 2020-08-30 10:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c465a5727f5b9af89274a66184286886 SHA-1: d0a7e9b20910fb4fda7d5f5ed41a1480617b394f SHA-256: d8b225f187dc4228eb97c778a4663af1414c23bfbeabe8a9ab41f3a2cc956c8b
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. While the document body contains garbled text, the presence of numerous links, including the malicious one, strongly indicates an attempt to lure users to harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=printable+weight+lifting+percentage
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/thermal_expansion_of_solids_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0448/0257/2437/files/sap_payroll_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/74246279563.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/lonimukobapekutalibagit.pdf
    • https://cdn.shopify.com/s/files/1/0452/6528/9378/files/atomic_weight_of_all_elements.pdf
    • https://cdn.shopify.com/s/files/1/0448/5578/7681/files/zalidojofififuwabi.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17f5444ee2445dbbd3d9962f5a52bed.pdf
    • https://static.usrfiles.com/ugd/ca300b_2f9c95cc48aa4554929fc8a514438ea8.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_3c0d59b048b746169b41d82c475e5084.pdf
    • https://static.usrfiles.com/ugd/6116da_8c58fd35aa2742e9807082a0136cb2ac.pdf
    • https://cdn.shopify.com/s/files/1/0431/4261/1095/files/assassin_s_creed_origins_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/acido_y_base.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/xudekijejafonetodokur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/fatibizegazavof.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/17404628900.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_off00007100.bin
fae52fb650a1d7f6c1765602b19a7a989f358a6438f80cafb09016289a82058f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7100 5332 bytes
font_01_sfnt_off00008327.bin
c1ea72ad6841b204c4e60656dbadbcf7ad34811221bcaedc35daaf3067384d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8327 10120 bytes

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