Malicious PDF — malware analysis report

Static analysis result for SHA-256 2040c5c1c961d5ab…

MALICIOUS

PDF

34.2 KB Created: 2020-08-31 00:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d5fb4dc3d5d60e6976d781cb0a3b5f6 SHA-1: 2944f8a5a93c255f47cdc10423dac7386173cae9 SHA-256: 2040c5c1c961d5ab656bad361960aedf3e31947664da35b56516ce01e82d94b4
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.com/wix?keyword=free+black+and+white+porn', is directly linked to a known malicious redirector infrastructure. Additionally, the document body contains obfuscated text and a large number of links pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself is used to host and distribute these malicious links.

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.com/wix?keyword=free+black+and+white+porn
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/togamobavugizirefaza.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/14467524909.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/subiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/waxege.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/78581067445.pdf
    • https://cdn.shopify.com/s/files/1/0465/2548/1110/files/ch3och3_hydrogen_bonding.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/93649607124.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/self_guided_walking_tour_of_toledo_spain.pdf
    • https://static.usrfiles.com/ugd/b8c837_88337e4664b04b30ac83f69ffabd745e.pdf
    • https://static.usrfiles.com/ugd/191a6d_ed66d402dadf4bcfa6312760e93e4d06.pdf
    • https://static.usrfiles.com/ugd/b8c837_844f99191be048459ebf93f46e03fc78.pdf
    • https://static.usrfiles.com/ugd/b8c837_43597533810547daa7ba4c2ad732d0a5.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/puwedibot.pdf
    • https://cdn.shopify.com/s/files/1/0439/6960/9886/files/rotumomepovinuwiv.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_off0000487f.bin
ea69e12ff8f84ed407aea78a11f46a749a0265e08a3689b518f5ebbb47a618b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x487F 5236 bytes
font_01_sfnt_off00005a52.bin
823d1c464d7a86636798fd55e84e6f62c02dcd1a92410dc7d0486c773bdbc16a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A52 10044 bytes

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