Malicious PDF — malware analysis report

Static analysis result for SHA-256 5941c41235142539…

MALICIOUS

PDF

49.1 KB Created: 2020-08-11 18:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 678bf1391bf15a192b1550b359ee24ec SHA-1: 5e8f77fba0f7715da4bbd7b86935b7f5ba25917e SHA-256: 5941c41235142539cabfe324019c591861e572ddbfea11ad9e9560eb29d88a35
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link farm. The primary malicious URL, https://ttraff.com/pify?keyword=bangla+translation+book+pdf, is presented as a lure for a "Bangla translation book pdf". The document body, though heavily obfuscated, contains this lure text and other embedded URLs pointing to various PDF files, likely to create a link farm for SEO poisoning or to distribute further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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/pify?keyword=bangla+translation+book+pdf
    • http://funozena.birthhealing.com/uploads/1/3/1/4/131407921/4126655.pdf
    • http://files.silverfoxxjournal.com/uploads/1/3/1/4/131436981/8978cf4a08e06.pdf
    • http://files.carpetcleaninggoleta.com/uploads/1/3/2/6/132695586/faxiwuxomafena.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/read_incest_comics.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/45270745600.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/dobuwawesivofugovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/49037153034.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21154843933.pdf
    • https://cdn.shopify.com/s/files/1/0434/7563/2285/files/32945912814.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/linux_commands_for_sap_basis_administration.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7579/files/is_ex_a_scrabble_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/375914644.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_off00005f8a.bin
2fdde34db9d307bf68874ab90fa50cb4ee497d549ed7edff997425eaaaff7669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 5464 bytes
font_01_sfnt_off00007220.bin
e6c8cbc0df91144c0915bb92bd49930bf4a28198943da1bb58b5ebf6ca6402a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7220 10832 bytes
font_02_sfnt_off000093a9.bin
e3fc7c27f2cf03e07b3d866dc59346b90d70a83556c0e9c5d550f8c1f2feb0de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A9 10588 bytes

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