Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c2543daa6acc0c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-14 20:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b794859523f47889a521034f43d09021 SHA-1: a4eb09467578c7b02ad07838522a464b61c3aae8 SHA-256: f4c2543daa6acc0c07dd4d11c98da4e6c4f78da68d47e412f3378e7f8b37d171
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves redirecting users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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.ru/wb?keyword=modelo%20historia%20clinica%20fisioterapia%20pdf
    • http://files.gaiatreeshala.com/uploads/1/3/1/4/131406811/getuxisukuxalag.pdf
    • http://files.eaglesunifiedbooster.com/uploads/1/3/0/7/130740257/gifoligedafus.pdf
    • http://files.kelseysq.com/uploads/1/3/0/7/130776599/pawuj-vigisanugeguwe-zigosogome-bunusujav.pdf
    • http://files.bigfootodyssey.us/uploads/1/3/0/8/130874610/bovemujur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4637/8404/files/bizifi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/93579221100.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/tipozipuxuvebaxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7634/4225/files/7602435631.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5224/files/24216823130.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/jujisanifikajenoxozedokub.pdf
    • https://cdn.shopify.com/s/files/1/0435/0279/6964/files/kofifageruju.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/zolisafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/sejusutibegamelulomod.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/valerimejaroramosobuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/jikifesufipudodu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/can_adobe_acrobat_reader_dc_edit.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/lowes_moses_lake.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/xufixakejozunez.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_off00006250.bin
f9e61c744e78f8eeeac4fbc1a80aee7483d138b2e3c2c34ac48b00f6e17c8de2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6250 5248 bytes
font_01_sfnt_off0000742b.bin
8d20584e6488f3d600fc17b4e69585f094ddb99820cc861c7a0687900a3ba297
pdf-font-stream PDF embedded font (sfnt) at offset 0x742B 10908 bytes