Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0645aae7e63442d…

MALICIOUS

PDF

39.3 KB Created: 2020-07-28 11:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a92484cbbdc792c885ae35afc90c1695 SHA-1: 80efa3d36276a2b56dc6740ae04ea882feef0b74 SHA-256: b0645aae7e63442de8ca29619e4f92f6720dee68cdcd915ffc214a12d27e54d2
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One prominent URL, 'https://ttraff.ru/pify?keyword=affective+test+sensory+evaluation+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicates maliciousness. The presence of a link farm suggests an attempt to distribute malicious content or phish users by overwhelming them with links, potentially leading them to compromised sites.

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=affective+test+sensory+evaluation+pdf
    • http://files.kimblevins.com/uploads/1/3/1/3/131398335/gamaxoweliluvem-zokoxexada.pdf
    • http://files.whsrobowarriors.com/uploads/1/3/1/8/131858975/6578fd.pdf
    • http://files.drawntolead.org/uploads/1/3/0/7/130776343/6577023.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/88247330741.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/tuper.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/zodadavewipisebomemejav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/kojedepakifowegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/kikar.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/gudexiworazapazisewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/faluna.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/42526316126.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/
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/kojedepa

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cdc.bin
afad3dd3c0432fc07106c20cc15b201b444c4f71f92283896f97c04a1e822af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 5180 bytes
font_01_sfnt_off00006e93.bin
73f626cf947039b82a5915c23c5ac2fab3dfc3d3678ca27413b90e7756220562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 9872 bytes

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