Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2afe7315f8e688…

MALICIOUS

PDF

51.5 KB Created: 2020-08-17 02:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe51b120fd5b7d46005eda2512353924 SHA-1: 4f4f33afeee1c044bc8a530373d5af8380b502f4 SHA-256: 9c2afe7315f8e6885a7ef010c4149b68e00a2d645e7ac96dae7836967a40e16a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the ultimate destination. The document body, though partially corrupted, contains text related to medical testing and the authoring application, suggesting a lure to disguise the malicious links. The primary attack pattern involves a link farm designed to direct users to potentially harmful websites.

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=piriformis+syndrome+muscle+test
    • http://files.medicalwhitepapers.com/uploads/1/3/0/7/130776416/fowuwipiz.pdf
    • http://xovizoja.wilddogstudios.com/uploads/1/3/1/4/131437615/zigagiwib.pdf
    • http://xugofexo.thevasculargroup.co.nz/uploads/1/3/1/6/131637016/2526372.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/41755973094.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3847/files/python_print_string_format_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/2460/5599/files/medicine_category_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/fukegas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/medical_certificate_format_for_college_student.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/3304506766.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/pomoditato.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/76440017012.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/64342961696.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/quality_analyst_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0436/2023/7475/files/anabasis_espaol.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_off00007638.bin
f7b1163c744579e70ff9e38e197b2e314206a5e30a128ed9ec99eef56d9427c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 4940 bytes
font_01_sfnt_off000086eb.bin
696ed6f3f1bb98c0740ce3b7db256f931658912ec9379b505e69cb205d566039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86EB 14120 bytes
font_02_sfnt_off0000b35e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB35E 4324 bytes

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