Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca077759da6601ad…

MALICIOUS

PDF

41.5 KB Created: 2020-08-23 14:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7a8b124e7780988af9ca2cf2c3b80c SHA-1: 1768f1f1f76069cd8d4e4d6f9700bf6ca744b0ca SHA-256: ca077759da6601ad1d1cb025089ce4f473ee057551dd35c2e193c5685220a2f5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a 'Cytology report for cancer' and also includes the malicious URL. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the 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.com/pify?keyword=cytology+report+for+cancer
    • http://files.trilingkids.com/uploads/1/3/1/4/131406592/bexiked.pdf
    • https://cdn.shopify.com/s/files/1/0430/3283/8298/files/molitajofal.pdf
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/sezifevebajezazet.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/83162022720.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/19844483129.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/online_editor_free_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0461/8233/4617/files/form_a_sentence_with_captivating.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/cannot_format_write_protected_sd_card.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/awaken_the_giant_within_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/denifawos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/42889172687.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/lesawavomuxukuxefumarul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/2130004429.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_off000066b5.bin
eeec8255e5e78bd5e8135c8f54541a36ab36b2826e41971d0e25de502e4cc9ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 5012 bytes
font_01_sfnt_off000077e5.bin
237d62cb118ace710f15fe68bc480d2b8037a06903997ca5e49fe47fb25cdc54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 9708 bytes

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