Malicious PDF — malware analysis report

Static analysis result for SHA-256 40442e81a87d04d7…

MALICIOUS

PDF

33.1 KB Created: 2020-08-01 08:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7d3e3d350c3bafeecb1a33cd17eb4b8 SHA-1: d5e87a480380e04b89c19b036deeab0d88dc9baf SHA-256: 40442e81a87d04d7e857035a5f32dde7b3a42dac7594f011aef43e5b4fb16d55
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, designed to redirect users to potentially malicious content. One such link, 'https://ttraff.ru/pify?keyword=sonic+advance+sprites', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting a lure to external content.

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.ru/pify?keyword=sonic+advance+sprites
    • http://files.mindfuldoodles.com/uploads/1/3/1/6/131637881/6618631.pdf
    • http://files.torringtondems.com/uploads/1/3/1/3/131384468/745649ee37.pdf
    • http://files.shadysideofthetracks.com/uploads/1/3/1/4/131406762/9744250.pdf
    • http://files.info-integratedtherapysolutions.net/uploads/1/3/2/3/132303286/8492154.pdf
    • http://files.zion-top.org/uploads/1/3/0/8/130813934/geriz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/84623653465.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/sasomimenevabudolunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/62319756532.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52657742202.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/dulunuzolaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/30475759115.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/58997722702.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/zetagakutulonuzit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/16922651642.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/fowunozumolenamotezew.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_off0000458a.bin
af9a99e7eb1302cbae517a4f96a793bc2b4f5733cd2a9ee35fab0ddd1fc7bd96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x458A 5196 bytes
font_01_sfnt_off0000574d.bin
00f488a741d7038110727b1eb9b6b5c7db4a310c0f0d3e480d406f30fb63b524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574D 9432 bytes

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