Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4438d205ae03ad…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 22:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62aa3a71463eda284c4d7d8f5b921fb3 SHA-1: 7ab570df2daa71b6286977da031cc5b24caf15ea SHA-256: ca4438d205ae03ada4d8dc967171c424846a28c88c41b62a0410dd5aa68d39ec
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a direct link to a known malicious redirector, ttraff.cc, which is used to obscure the ultimate destination. The document body contains garbled text and references to 'Calquence full prescribing information', likely a lure.

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=calquence+full+prescribing+information
    • http://tujibu.thefilamentstudio.com/uploads/1/3/1/3/131379362/ac2a5.pdf
    • http://vimun.bowinertia.com/uploads/1/3/1/4/131454012/nepiv-lidewonasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/nimonutuguriregufosimewas.pdf
    • https://cdn.shopify.com/s/files/1/0461/4176/7833/files/50349161799.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/georgia_march_luckinbill.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/fitudixegefukegojupogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/24930259776.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/86287509443.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/36160932566.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/axis_blue_chip_fund_performance.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/change_axis_labels_in_r_ggplot2.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/defecto_septal_atrial.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/acrobat_reader_pro_dc_trial.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/3917121770.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/jetofevagisasinujasirafa.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_off0000600f.bin
4083a637b340972ae9c74a40d6a28f7f0e9d567240ee8c46da640882fffadeeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 5508 bytes
font_01_sfnt_off000072b0.bin
07b593537e745f80b5e21b958842a60d139f8e3181866bb45c4032e0bc6bf589		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B0 10132 bytes

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