Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81ed5eaea86662e…

MALICIOUS

PDF

53.8 KB Created: 2020-09-04 07:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 898f93ca911bf2adca2ecdb11c6084a1 SHA-1: eaa726e5a7e6094a5e8281ddf070883b3f8bed6e SHA-256: a81ed5eaea86662ecb38a57897ebc083a7debf41d7718a6c587546e194d1c85d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, with many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to lure users to malicious sites.

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.club/pify?keyword=cooking+guide+for+boneless+leg+of+lamb
    • https://static.usrfiles.com/ugd/b8c837_323fc7260c8e4fbf8ba06a48e7f2aac7.pdf
    • https://static.usrfiles.com/ugd/964009_26915b577da44407891257735330e045.pdf
    • https://static.usrfiles.com/ugd/e6092c_c5205f4b2a624d44981db6f7733ea7e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dc44b513a91422ba7f706e21f424909.pdf
    • https://static.usrfiles.com/ugd/eb6612_72a1d347167a4cd5a39e55462c73398b.pdf
    • https://static.usrfiles.com/ugd/80fd5d_3eb36c1ef6d14847967f81caae06571b.pdf
    • https://static.usrfiles.com/ugd/2c608b_90eb39cf011f4f6b82a7828f9f1bb2c7.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1344/files/material_safety_data_sheet_for_chemicals.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/xukolarip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tovunegorudakumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/libros_minimalismo_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/wunoliditug.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4453/files/26849929176.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/haskel_air_driven_fluid_pump_manual.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_off00007c9a.bin
73b9c7b7c945cc0aa295ee7bf792061fe4aae910475c5e10ad07d836a29662e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9A 5336 bytes
font_01_sfnt_off00008eaf.bin
9fc826bb390a93a6d5325098aa3152606a32d5776a5ec47019192d72f6a33a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAF 10996 bytes
font_02_sfnt_off0000b471.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB471 16092 bytes

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