Malicious PDF — malware analysis report

Static analysis result for SHA-256 59528f26ffba88cd…

MALICIOUS

PDF

48.6 KB Created: 2020-09-03 07:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b884327e7206e26c39aecfebbe567aec SHA-1: 343e3bb8b5590d4d176b33bebbeed88a388a0489 SHA-256: 59528f26ffba88cd99eb06c56081e2a6c2156a7f760e7fac9ca3e71d8699f537
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=renal+transplant+guidelines'. This URL is presented within the document body, disguised as 'Renal transplant guidelines', indicating a phishing or social engineering attempt to redirect the user to malicious content. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=renal+transplant+guidelines
    • https://cdn.shopify.com/s/files/1/0462/6451/6757/files/black_t_shirt_template_png.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1637/files/java_repeat_string.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/best_rom_site_2019.pdf
    • https://static.usrfiles.com/ugd/b7082a_833dd648f32d4c95abf5ee9f8ae5a043.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/mixing_water_with_urine_drug_test.pdf
    • https://static.usrfiles.com/ugd/f08e01_e26d2b812d884dd689d2c4d6ceb04198.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_7c3947abd2e24c50805578b6650c77f6.pdf
    • https://static.usrfiles.com/ugd/6203b9_791ef5feb1734543af75cec8c1e3d686.pdf
    • https://static.usrfiles.com/ugd/b48b60_ea9da3479db84d9fb60dfabca144e10f.pdf
    • https://static.usrfiles.com/ugd/9757e7_928e0c0cfb264de8bb6f0f576e51c1c3.pdf
    • https://medlineplus.gov/kidneydiseases.html
    • 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_off00007276.bin
c3b5c3cdf7ae434273a256cbae8bb0a5797df89537f9781621bdd4d1b9f2534a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 4904 bytes
font_01_sfnt_off00008327.bin
2df97833faa694bd24c9a0afc073d96b3551883a096d5459b2a488e1aecd009d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8327 10708 bytes
font_02_sfnt_off0000a7b9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B9 4324 bytes

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