Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4c0c2a91a95cb5…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 18:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4811202e3063dbe5cfa2b072db74fc1 SHA-1: c81f6d6598d416f9183b1fa74a09d01fde0d3977 SHA-256: bd4c0c2a91a95cb5d612e5fedaa4c4da0df63b6cc125a7929d735d3fd16b0053
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for a movie. This link, 'https://ttraff.com/wix?keyword=barbie+star+light+adventure+full+mov', is a critical finding. The document also exhibits characteristics of a PDF SEO link farm, with numerous embedded links, many pointing to benign Shopify URLs, but the primary malicious intent appears to be the redirector. No scripts were extracted, but the presence of the malicious URL and the ML classification strongly indicate a malicious intent to redirect the user.

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.com/wix?keyword=barbie+star+light+adventure+full+mov
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/norimajero.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/introductory_chemistry_5th_edition_tro.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9633/files/nefumulutefe.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/77568198835.pdf
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/nikopekinozozoroja.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/borixinalekekipuzifoso.pdf
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/discord_advertising_servers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/rotudigupuvonezulelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/galolofumubasijifesob.pdf
    • https://static.usrfiles.com/ugd/cf14a4_f2819cd47e864b0b8a4a53a749e40127.pdf
    • https://static.usrfiles.com/ugd/b8c837_41d861efb37249c79c5cdb82e032f555.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_01f81f084f564b0c907b88400b0a68c3.pdf
    • https://static.usrfiles.com/ugd/b6edda_cc996ed35b6a4f3bbbeff8db77a34f1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_321509018dc64367ae7f55a15431404a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5fddef02037449ab386570039cce41f.pdf
    • https://static.usrfiles.com/ugd/e2c250_b4916b0a92854218a459ece5efca33c3.pdf
    • https://static.usrfiles.com/ugd/724fb5_43cdf85701a746cdb4dd94b942b73bd5.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_off000055a0.bin
b5a20bee53a08449e805c62efdd8138de7946c9505d45d9d1f7379de5b805e24
pdf-font-stream PDF embedded font (sfnt) at offset 0x55A0 5568 bytes
font_01_sfnt_off00006867.bin
d3c37dca42be9ecf240bef7614e36c15e32d4976c33e710e3bc0ad6310596c5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 10532 bytes