Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb99f05334344a73…

MALICIOUS

PDF

41.0 KB Created: 2020-08-03 19:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79acbdfbf38c8f9b1261f12160e21685 SHA-1: d432fb7025a3d3e147bf488bf8c44a6ff9766b86 SHA-256: fb99f05334344a734bf627935f10283b471decb65004560c62ca31a5b7de9ebd
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=bromelin+xarope+bula+pdf
    • http://files.chipsiunc.org/uploads/1/3/0/7/130739744/kivirebavaf_foxawerutelizu_rujoleki_modedemifuv.pdf
    • http://files.kyrgyzfelt.com/uploads/1/3/1/6/131606366/mevuwupi.pdf
    • http://files.oslutheran.com/uploads/1/3/1/4/131483249/dulifeduzasuzafufa.pdf
    • http://saruxoro.wacooutdoorkitchens.com/uploads/1/3/0/7/130740025/7641887.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/37695418167.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/tuvemiroma.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4220/files/44719183510.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/27608926017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/29701563004.pdf
    • https://cdn.shopify.com/s/files/1/0430/3319/8745/files/semuvanabuwozelur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/gubujimajekijebularadi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/46416162683.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/25708866243.pdf
    • https://cdn.shopify.com/s/files/1/0439/9477/5710/files/kubemowugemukazepigeviga.pdf
    • https://cdn.shopify.com/s/files/1/0430/6878/4791/files/18844687824.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_off00006235.bin
27e0123617e1eb17615450c1a6977cc58d64c61c1750c81d1002abe41749732d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6235 5264 bytes
font_01_sfnt_off00007400.bin
4c1e6276161bbf14784bda39fc1030b649bd3258c2e032476645c0c3cbe3c8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7400 10268 bytes

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