Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db28a1248fb2075…

MALICIOUS

PDF

38.6 KB Created: 2020-08-23 01:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0d33c765a09029b4e06c906e07e6787 SHA-1: 611fc5b44ec24212771037d46fe7185aec9993f6 SHA-256: 2db28a1248fb2075a9ac3c9121cadc3cbd9a3b4d3552b710e203fbeab6236765
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=calendario+mondiali+2018+excel'. This URL is presented as a download for a 'Calendario mondiali 2018 excel'. The document also contains a PDF link farm heuristic, indicating a large number of external links, many of which point to Shopify-hosted PDFs. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=calendario+mondiali+2018+excel
    • http://sodoti.spidirnetwork.org.uk/uploads/1/3/1/4/131438759/xamozetebifafe-tavoliwiz-tevigi-sisevisem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/fuwusefowigukexin.pdf
    • https://cdn.shopify.com/s/files/1/0447/3815/0549/files/censorship_in_media.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/biozone_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/54666496490.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/arteries_and_veins_of_the_lower_limb.pdf
    • https://cdn.shopify.com/s/files/1/0440/9013/0584/files/december_2015_blank_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/sutajiwabefuti.pdf
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/xarotabo.pdf
    • https://cdn.shopify.com/s/files/1/0450/3257/1044/files/acg_practice_guidelines_for_alcoholic_liver_disease.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/command_prompt_shortcut_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/makewal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2808/files/89325255662.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_off0000580a.bin
6d303f30d686c6a073a06a7429dde50e5b18f7adb8589224aec3637f0944e5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580A 5400 bytes
font_01_sfnt_off00006a55.bin
a08550eae784dc96fcc1bea16f22607db8ca98a0793f84382d999eb1fba398bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 10428 bytes

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