Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f4707b92248e7b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 11:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 585c23ca5cb29f8d689e2eec8174499c SHA-1: 36587be04beb760b931ef5f2e2588b7fdcbe072f SHA-256: 90f4707b92248e7b25bd3554fcfe8140bf91f49ea1d9bbbc8ef29497c432067b
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a critical heuristic firing for a PDF redirector link pointing to 'https://ttraff.ru/wix?keyword=vince+gironda+6x6'. Additionally, another critical heuristic detected a PDF SEO link farm with numerous external links, including 'https://static.usrfiles.com/ugd/5e8de6_434b490a29da4d028d56afabab6ab159.pdf'. These findings suggest the document's primary purpose is to lure users to malicious or SEO-manipulated content.

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=vince+gironda+6x6
    • https://static.usrfiles.com/ugd/5e8de6_434b490a29da4d028d56afabab6ab159.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bf9632746ed458aacff48ff9b45cbd9.pdf
    • https://static.usrfiles.com/ugd/cb5dea_a753082923214473a6f168122e862216.pdf
    • https://static.usrfiles.com/ugd/63d3ad_dd2b729c8f094d3ab3c1b9f3fb9da9d0.pdf
    • https://cdn.shopify.com/s/files/1/0437/0939/9192/files/music_lover_synonym.pdf
    • https://cdn.shopify.com/s/files/1/0432/5261/3277/files/haskell_length_of_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/cisdem_video_player_for_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7528/files/brine_rats_osrs_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/freddie_mac_conforming_loan_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3359516262.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/alchemist_code_setsuna_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/0715/5110/files/refewipofetapetoligubon.pdf
    • https://static.usrfiles.com/ugd/b8c837_c07078fac9d04a0caddf1b60a8167997.pdf
    • https://static.usrfiles.com/ugd/913720_3064d30e08704ec9b9eb9534ddd6cd11.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_off00006289.bin
bdf6ad3556d1bea49912ec42b535c3ace92b0310a01f1fd070e94abefc5fd915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 5084 bytes
font_01_sfnt_off000073dc.bin
c95b43d9d3faf2f3767c42a7ccadaf354f0a42a238cd996b4f5d111165362b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DC 10384 bytes

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