Malicious PDF — malware analysis report

Static analysis result for SHA-256 be587ffcaaa42293…

MALICIOUS

PDF

46.6 KB Created: 2020-08-20 03:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6755455a749ea20c68a9f8193cdce5c1 SHA-1: 79622c378717c75ea66f39f6a1e25734f5a92776 SHA-256: be587ffcaaa42293accbd2c7d62ca5a1f5fe7b1d171d65b08e5de263ca670d2c
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=cardiopulmonary+stress+testing+guidelines', is flagged as a malicious redirector. The document body is heavily obfuscated, but the presence of the malicious URL and the link farm heuristic strongly suggest a malicious intent, likely for SEO manipulation or to redirect users to malicious content.

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=cardiopulmonary+stress+testing+guidelines
    • http://files.tdavid.net/uploads/1/3/0/7/130739826/969e885dcfde18.pdf
    • http://geter.bespokecurtainsandblinds.com/uploads/1/3/1/4/131453215/fedajemito.pdf
    • http://files.pack216mcs.com/uploads/1/3/0/9/130969708/delosugev-rajijen.pdf
    • https://cdn.shopify.com/s/files/1/0436/6663/6953/files/abellio_greater_anglia_delay_repay.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tuwupijisunuxavupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2096/6293/files/dipida.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/biology_10_class_notes_english_medium.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/writing_and_evaluating_algebraic_expressions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/83746785216.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/deductions_and_adjustments_worksheet_define.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/32078465673.pdf
    • https://cdn.shopify.com/s/files/1/0439/0138/6920/files/gaboxowol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/vegukogimoselejuxov.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5512/files/xutemuzojejutipakepube.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007848.bin
ba06b0216cb6657fede40a8c73fd9386736164c018bed211c9157d3d5393a2ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7848 5288 bytes
font_01_sfnt_off00008a38.bin
853a8f4e748d743cd60f7f2dfff74da1bc10c9542254d9c21b3b7ed5404d4fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A38 10376 bytes

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