Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf630a35f26a523b…

MALICIOUS

PDF

45.4 KB Created: 2020-07-31 08:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7eab7f8370d5159dde7f1b0f4852547c SHA-1: 6959ff51ebee4706fbc0a8af2a6ace83f41af135 SHA-256: cf630a35f26a523b293407e37aeb5144b109380f4d077e22190a3df4978126ce
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, likely for obfuscation. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, limiting the analysis of the payload.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=bankersadda+monthly+pdf
    • http://files.seymourcoc.org/uploads/1/3/0/7/130739802/6405797.pdf
    • http://files.sheilakitchen.com/uploads/1/3/1/0/131070152/8145055.pdf
    • http://files.thedessertbarsc.com/uploads/1/3/0/7/130739570/8ff19.pdf
    • http://files.seymourcoc.org/uploads/1/3/0/7/13073
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/nizizudenupanefevizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/kipevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/51546258693.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/42635029880.pdf
    • https://cdn.shopify.com/s/files/1/0432/0205/2257/files/73190914603.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/54254834232.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1871/files/pugawaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/jovukinenopare.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/7190267284.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/vaxeduxaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/14492585814.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_off000074a2.bin
a88c3f7e9463cfc822ab668d8891bb3678f6088fb82f22370480386a09c760a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 5236 bytes
font_01_sfnt_off00008647.bin
29384a44c7592f096b6cff71cab449401ef3783d437d200ad325b737d95b1e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 10060 bytes

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