Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c511f95c7deffbb…

MALICIOUS

PDF

35.8 KB Created: 2020-08-23 10:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 934a2645dbfaf0a600d7a898da295e58 SHA-1: 50748fcd0f8f159bda8697dff216f23bed9744fb SHA-256: 2c511f95c7deffbbfeaf622e39c27a65c9c5fb06a4b8709864fbb0d513f244aa
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to obscure malicious destinations. One critical heuristic identified a direct link to a known malicious redirector at 'ttraff.com'. The document body text, though partially corrupted, includes the phrase 'Brazing copper sheet metal' and a URL, suggesting a lure to trick users into clicking on the embedded 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/pify?keyword=brazing+copper+sheet+metal
    • http://xolipupa.vagelismakris.com/uploads/1/3/1/6/131637016/dabedikonezaj-duzariwer.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/kiboripemipibozuzoluda.pdf
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/24335499938.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/dowevaxowe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1373/files/47082066681.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/animal_farm_novella.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4485/files/comparative_anatomy_of_vertebrates_heart.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/noletotadudaxelotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/11230962366.pdf
    • https://cdn.shopify.com/s/files/1/0464/8678/2120/files/gta_5_lester_money_guide.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_off00004d9e.bin
5dabdf79aefb4bdbe2060be6c720dbb0399509069c99944cbfb6021e9111c8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D9E 5448 bytes
font_01_sfnt_off00005ffc.bin
a02cf7fa8bd86b5b4d193f2f899e2429a2168c73b64b9178b37f5b71196028c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFC 10160 bytes

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