Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7e4dcc448ac60a…

MALICIOUS

PDF

103.4 KB Created: 2020-09-07 20:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7410409b38c4d0a6b8983d17edfe6cdf SHA-1: e42c5a6a530aef9f6790e1d5ea5d300d4198042d SHA-256: ff7e4dcc448ac60a217dd47c372558a2bc358866609770c2bc4e879c4b4a89b9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. The primary attack pattern involves luring the user to click the malicious link.

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.com/wix?keyword=libros+sobre+aprendizaje+significativo+pdf
    • https://static.usrfiles.com/ugd/b50c55_82eef443867a41d99aa1a014dd00cf0c.pdf
    • https://static.usrfiles.com/ugd/bfbc46_ee10bb18e8694b70a941b867a1bd0403.pdf
    • https://static.usrfiles.com/ugd/e00bd3_ccbc4e1f3c7c43c4a000a3ce56a86899.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a9ae132204e4e5d83e4038aca1f278f.pdf
    • https://static.usrfiles.com/ugd/510a18_d09d62bff5c648539214314e4a86b931.pdf
    • https://static.usrfiles.com/ugd/a31856_03778d1cb4da4843a1db83d87f4540a0.pdf
    • https://static.usrfiles.com/ugd/ce5d00_13059325bbc94496a5c5d05fe2046ff4.pdf
    • https://static.usrfiles.com/ugd/d90490_a61026e71a904c36a7b646f6e9bf9dbc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/mini_14_full_auto_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/airdrop_from_macbook_to_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0462/4675/6506/files/volume_of_shapes_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/easy_guide_to_jazz_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/mariokart_wii_rom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/number_to_text_google_sheets.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_off0001454e.bin
4078ef45d794afac1e176a4eab0369cd5d34435d677f9277f73868322d900a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1454E 5348 bytes
font_01_sfnt_off00015799.bin
81d3768b51ab6d210843ff2fdf76915051e6f652212625340f88fc60fed486a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15799 12444 bytes
font_02_sfnt_off0001802a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1802A 4324 bytes

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