Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d3a609ebeb035e…

MALICIOUS

PDF

72.4 KB Created: 2020-08-18 22:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baa7dd93d774dc67886edac67d074d4a SHA-1: 90ab037692f53786f91a698564d582f652ead897 SHA-256: c7d3a609ebeb035e0c77c25b69e7a2502e240bd9464fbb458ffaa2a9084b0080
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, which is characteristic of SEO link farm abuse. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector URL is sufficient evidence of malicious intent.

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.cc/pify?keyword=rectangular+cartesian+coordinates+pdf
    • http://tenejuba.cotamtb.com/uploads/1/3/0/7/130776508/bawogesape.pdf
    • http://raneve.frosthoneybeefarm.com/uploads/1/3/2/7/132740541/fagebapotasu.pdf
    • http://kujeximot.marinasinclair.co.uk/uploads/1/3/1/3/131398104/jodoz.pdf
    • http://files.theselfdiscoverycenter.com/uploads/1/3/1/6/131606275/4102115.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/autogenous_mill.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/97484429374.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/13950752766.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/68968076569.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/electrocardiography_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/mcdougal_littell_algebra_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/kawopazed.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/pejapap.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/14034331657.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/tesuwonivobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/kurejivefuki.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ce.bin
fbfca4c0debebdb7401cef281786f064ae1db8f5d3ad349afcec414b93a7bb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CE 5212 bytes
font_01_sfnt_off0000c496.bin
5d1cbad507375b652e778fd541b984f1c52e9b6c8a6b75087527f852eb62fa60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC496 13944 bytes
font_02_sfnt_off0000f0e8.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 16036 bytes
font_03_sfnt_off00010550.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 4324 bytes

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