Malicious PDF — malware analysis report

Static analysis result for SHA-256 f042d0c3cdecf22b…

MALICIOUS

PDF

45.9 KB Created: 2020-08-28 04:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70cd991ce43e534effdef294d9c473be SHA-1: f6f371bb7bcc0f2cd1ed70e9db784e8768894d6b SHA-256: f042d0c3cdecf22b9db0f829f81336df5a30504a93dd60362fa25f0b587845c3
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=kafka+en+la+orilla+pdf', is designed to lead users to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, and the document body was heavily obfuscated.

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/pify?keyword=kafka+en+la+orilla+pdf
    • http://files.zandertherapeutics.com/uploads/1/3/1/6/131637178/6601931.pdf
    • http://files.stdastoriayouth.com/uploads/1/3/2/7/132741144/fegefi-tejufijo.pdf
    • http://files.communityfriendschurch.com/uploads/1/3/1/4/131453354/02b058ac28bd7.pdf
    • http://files.acquisdata.com/uploads/1/3/0/7/130775746/davisefegedexivinale.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/femumupekurufijodiviti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/sikukebiloz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/97382721618.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/copy_file_sang_word.pdf
    • https://cdn.shopify.com/s/files/1/0461/7836/9699/files/ryobi_p2006_cordless_string_trimmer.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/ridixerotarapoleb.pdf
    • https://cdn.shopify.com/s/files/1/0440/4710/6213/files/chiedere_informazioni_al_telefono_in_inglese.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/vumijipatu.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_off000067cd.bin
2a76d5d15ba42ed2c134329c5fd7d4976e0c712c4789001bb0795324b90f510c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CD 3588 bytes
font_01_sfnt_off0000749c.bin
1e7d4680eea80c1c0e1833e237eb04fd14c05c2884655b3900704d4555fca006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749C 4888 bytes
font_02_sfnt_off0000854f.bin
45a5666f120e6ddaee6c54c04d8e696ab1d512ceeecf31a429a5cc0e183aac9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854F 11032 bytes

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