Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c379873719cbea…

MALICIOUS

PDF

40.2 KB Created: 2020-08-20 08:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 919968e91435a8f0a41491ba3a09b277 SHA-1: 800089070a9146b80a0ea87f4e5b578d937f5b49 SHA-256: e2c379873719cbea5b54b81bf03bae91f8dda9a04989d8d7b7976d94d6d32971
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This link is presented to the user as a download for 'blank clock worksheets printable', a common lure. The document also contains a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation to improve the ranking of the malicious redirector. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=blank+clock+worksheets+printable
    • http://files.sierranevadastorytelling.org/uploads/1/3/1/6/131606901/jowuko.pdf
    • http://files.kldsoccer.com/uploads/1/3/1/4/131409200/8486089.pdf
    • http://files.carolinemfisher.com/uploads/1/3/2/6/132682731/a5d16a0062bfe3e.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/bruno_mars_grenade_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/38357209067.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/dragon_nest_level_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/xotovatuwogofenekomikume.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/contact_energy_annual_report_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/muzuzuvifubujilusitodun.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/92422223803.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/mumuzapewe.pdf
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/18777985152.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/fabric_minecraft_mods.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_off00005ad4.bin
f9eff2eb6b84db72f93594d2b5f0f96fd40c39a3e3db3c5f3e0fab71d6f2479d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD4 5368 bytes
font_01_sfnt_off00006d1a.bin
f740ddd91f7e34532eeac43186f53299bf7b4049558cd674bc6caa6aad369b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1A 11604 bytes

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