Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f83ce9a3ac9c9e0…

MALICIOUS

PDF

42.1 KB Created: 2020-08-02 12:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa248731869e2cd21cee0ee3243b38b7 SHA-1: 0b7a8f8d973ae20487c94dc33152db492d6294e7 SHA-256: 4f83ce9a3ac9c9e093a9d5bd6a14bcd058ed5a7a585dbfb41ac28c2cccec42bd
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is ttraff.com, which appears to be used for redirecting users. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a lure to download further content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=pentair+pool+filter+manual
    • http://files.painting.zone/uploads/1/3/1/8/131856166/xupoz.pdf
    • http://files.janestraveladventures.com/uploads/1/3/0/7/130739363/todabikepuvomek_wajusivokoker_murubeganeb.pdf
    • http://files.motscatering.com/uploads/1/3/0/7/130739309/f4927.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0146/files/33876218541.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/16195770928.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/puxixibutilurox.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/lazowimepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/89696756617.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/raspberry_pi_power_supply.pdf
    • https://cdn.shopify.com/s/files/1/0435/3435/2548/files/24306509911.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/95101925332.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegofegomena.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.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_off00006416.bin
e1eeaeffb5ca4e5dc40ceba611579d1daa4e0edd9bab3991b04f879abb43a7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 4872 bytes
font_01_sfnt_off00007493.bin
9a8b1b5d48e0163504358a896caa46e56b0a0efe047aed048286a168793bd186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 11052 bytes

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