Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2dcfe3e04d56345…

MALICIOUS

PDF

42.0 KB Created: 2020-08-22 09:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 516f1ccf54ecb3c199971bfc16c33140 SHA-1: f569b837868df225443392487a167cfb313d6ac0 SHA-256: f2dcfe3e04d563459f7e5b790f0e5882f8f27995773cc43a72ac48be535aa907
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=search+inside+yourself+book+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing a PDF related to a book search. No scripts were extracted, limiting the analysis to the PDF structure and embedded URLs.

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=search+inside+yourself+book+pdf
    • http://dugaba.papajohnsfarm.com/uploads/1/3/2/6/132682663/551c73b4.pdf
    • http://nebixut.2whatknots.com/uploads/1/3/1/4/131454215/9882858.pdf
    • http://files.boatshedgallery.com/uploads/1/3/1/4/131407552/7454102.pdf
    • http://rejized.drjuliannavalearningacademy.com/uploads/1/3/1/6/131607062/2655360.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/vacuum_annealing_furnace.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6412/files/19295575461.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/60308590958.pdf
    • https://cdn.shopify.com/s/files/1/0441/3282/7288/files/75287588899.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/26443446361.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/14960609827.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/54270357333.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/gameze.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/vanexukubal.pdf
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/68515820453.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/25790547965.pdf
    • https://cdn.shopify.com/s/files/1/0438/2661/0333/files/57744619339.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_off00006070.bin
3510eedf38b8fa90f172ca2469090a370d7b8fe5074499704e97a94500313f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6070 5652 bytes
font_01_sfnt_off00007394.bin
5bdf18addb28211e3a7e6564a9c0df17daf838af67cf957dca70d9b6a836a00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 12416 bytes

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