Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb8ea8b174d7fac…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 17:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83c3df46cac6a9aa10725a20fa7b4bf9 SHA-1: 7976f7e896b3ad0e16cd44a012a9429bcfd4c081 SHA-256: fdb8ea8b174d7facb9a0396fe59298c3fe61f610f9fe6371f4606b3394515eb6
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'PLC troubleshooting guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and link farm indicate a delivery mechanism for malicious content.

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/wix?keyword=plc+troubleshooting+guide
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/4982052247.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/gedozebiluwesowugifeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/0989/2767/files/como_dobrar_uma_folha_a1.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/bugegevubonoreliwuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/dudugakanonetoxapamuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/nonlinear_control_khalil.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/how_to_add_directory_to_path_linux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3063/files/29202253334.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/everything_happens_for_a_reason_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/milwaukee_brewers_schedule_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/indian_business_case_studies.pdf
    • https://cdn.shopify.com/s/files/1/0437/4642/7031/files/messenger_video_call_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/assinar_com_certificado_digital_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/calculus_by_swokowski_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/is_pixel_gun_3d_on_computer.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/2020_calendar_printable_nz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/xarebi.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_off000065f9.bin
641fe83a8924c864b882b58adce3fdf3cb312902c33d25d80decd5a5a751fb16
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 5132 bytes
font_01_sfnt_off0000775a.bin
68795a103e8032c53f9818cdcd43e157987dd3a5d5b8afcc00c2173494791ca3
pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 10240 bytes