Malicious PDF — malware analysis report

Static analysis result for SHA-256 58015c221f2a9cfd…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 15:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7128d98a0fbb70d988588a663d347ed7 SHA-1: 441d66f91f7274bfea960b049f5ec847df9b3b3b SHA-256: 58015c221f2a9cfd9aff95d4a1601c9ad60b0660a5dce1a7b8631ba8fd24dd9e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.ru/pify?keyword=cabs+academic+journal+guide+2018. This suggests the document is designed to redirect users to malicious sites under the guise of providing academic resources.

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=cabs+academic+journal+guide+2018
    • http://files.e-trendsmagazine.com/uploads/1/3/1/6/131637302/tubotukujefasa-tadogi.pdf
    • http://povodena.irrigationvictoriabc.com/uploads/1/3/1/4/131437462/c6e514.pdf
    • http://zopasara.designzbydebra.com/uploads/1/3/1/6/131637814/sepisalo-jupizipurovisa.pdf
    • http://fovazufo.myclipartcafe.com/uploads/1/3/0/8/130813528/gavedek.pdf
    • http://tazob.hooberproduce.com/uploads/1/3/1/4/131483371/8edf986.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/analog_signal_processing_webster.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/jonojoxazudefubopopibox.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/fuwovutof.pdf
    • https://cdn.shopify.com/s/files/1/0430/3192/0794/files/medical_laboratory_tests_normal_values.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9126/files/61147422728.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/48481737524.pdf
    • https://cdn.shopify.com/s/files/1/0438/3634/2434/files/gufunuwora.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2674/files/nuvewoviguvumemewofot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/waguxajevuvudigaduzumibin.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_off00006515.bin
5b5457c30b77ef008459880616fed7bd9260266f6c83d8b9afafe24bce4f7079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 5900 bytes
font_01_sfnt_off0000790e.bin
074a004bd57947ee0f8651d0280ab3428686348d885bc228c65b60034cbfe0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790E 9824 bytes

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