Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5c199b99616a8b…

MALICIOUS

PDF

47.2 KB Created: 2020-08-13 21:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f79be4957f3b283478cda0811bfd695 SHA-1: f33dabb313790882f810decbb7ddb23b9978e618 SHA-256: db5c199b99616a8b237bf5503dcbb06fa413455e0001dfecc1cbd2891ce41fdf
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This indicates a link farm or redirection tactic designed to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious infrastructure via these embedded links.

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=disgaea+5+alliance+of+vengeance+trophy+guide
    • http://vusog.nationalparkswithkids.com/uploads/1/3/1/1/131163590/novexuvesap-titubazojedor-jimoxenolaf-mogewupu.pdf
    • http://files.balanceandneurologic.com/uploads/1/3/0/9/130968921/97248a9373a.pdf
    • http://files.watips.net/uploads/1/3/0/8/130874125/kaxiwawujidobopib.pdf
    • http://budogif.pathwaysforhealth.net/uploads/1/3/1/6/131606255/lajuwibekas-xijipofurun-wugajaloko-ponuluwalimap.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/fikiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/linksys_wrt54g_2_v1.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/subtraction_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/20732984024.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/jazog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/lovebuduj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/peniwusov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/dutofixuwarogelezejosif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/jiwiriluza.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/fisegube.pdf
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/fujexorodidororuwipumej.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/54765880285.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/73889696650.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca7.bin
00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA7 2960 bytes
font_01_sfnt_off00007716.bin
3a27900e197f107fe31353817a3255b3c703f360068e4000e72bcfa061ba5a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7716 5700 bytes
font_02_sfnt_off00008a8b.bin
d15ac9a61d76b9dc218f2cad47909346517ce94652e31b41c357274907cf2d2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8B 10628 bytes

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