Malicious PDF — malware analysis report

Static analysis result for SHA-256 a116a58ddf8a4608…

MALICIOUS

PDF

42.2 KB Created: 2020-09-01 05:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cebdfa8d9768d3105ff6e265106b093 SHA-1: 299b6a0595fc4d1faa8d098f94e910a295772fac SHA-256: a116a58ddf8a4608970b335296b10cfc63911409f721b5e9734d848b6bb4656f
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which are hosted on Shopify. One of these links, ttraff.me, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Codility exam answers' and the malicious URL, suggesting a social engineering lure to drive traffic to the redirector. No scripts were extracted from this sample.

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=codility+exam+answers
    • https://cdn.shopify.com/s/files/1/0444/6437/3927/files/lookup_function_in_reporting_services.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/tubebazepejuzapupewidejug.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/89527850680.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2773/files/8383201659.pdf
    • https://static.usrfiles.com/ugd/b11f6d_1cfaea2013df4bf3a9f4677a3b7c3d61.pdf
    • https://static.usrfiles.com/ugd/c7a620_38a9e3226aff481ea0e907f70151a9b5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/878988517.pdf
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/28786771931.pdf
    • https://cdn.shopify.com/s/files/1/0439/5817/3854/files/papabugokabuloniboxevupig.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/fijekozowonatatezifux.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/67099351317.pdf
    • https://cdn.shopify.com/s/files/1/0440/4314/1270/files/33456494372.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_off00005d85.bin
6f359d2f2d035ca18f5ca19b1ecefc04d1ad3ca91f9733010ded6ad4adc0dda5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D85 5140 bytes
font_01_sfnt_off00006ef9.bin
580fdc287914dc89f0826d3562f19dd8f7729f7b8deacba2aba2283b079d5d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 14128 bytes

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