Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab99055ba5cc41fb…

MALICIOUS

PDF

44.8 KB Created: 2020-08-14 16:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62d2cb9048d6611084d8b06bf5b9b651 SHA-1: b8df37a9c2f3d7519d4766f59bdffc529221761f SHA-256: ab99055ba5cc41fbc7017ea40e4e9b85eeee13bcaf4cf238fb790f62783f18e1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=adobe+air+android+free'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The document also contains a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The primary intent appears to be to drive traffic to the malicious redirector.

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=adobe+air+android+free
    • http://files.y4f.co.uk/uploads/1/3/1/4/131437123/lenip_vijunobarezate_kuwamuzexigisup_nenujutupovix.pdf
    • http://files.pacehighchoir.com/uploads/1/3/1/8/131871891/2056809.pdf
    • http://files.inspirepacohio.com/uploads/1/3/1/3/131383330/nepunugozaribebe.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/3d_maker_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/83560934633.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4194/files/hp_printer_install_wizard.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/tudiwofemi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/wizofilum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/37672192321.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/zilirolaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/tigivorodijijan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/english_grammar_practice_exercises_with_answers.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_off00006780.bin
d230630283b64d43dec297c7ecda5771151b90eee91b12e7c7023763338db13d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 4528 bytes
font_01_sfnt_off000076da.bin
b377d835fc92fdd3daab78fd35f2e09abb349970bce56390e7ed872625e77d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 9976 bytes
font_02_sfnt_off000098fd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FD 4324 bytes

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