Malicious PDF — malware analysis report

Static analysis result for SHA-256 6694267500bacfab…

MALICIOUS

PDF

34.1 KB Created: 2020-09-08 13:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93906bebeaa03fd9aa2c475cc2bb9321 SHA-1: 6f0e698df36f8f322abe91da1ad19bc3581ba1c5 SHA-256: 6694267500bacfabff46174babf9d65de8f50fb2d3e58c555f386c66d0ca10e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also exhibits PDF_SEO_LINK_FARM behavior, presenting numerous links to external PDFs, likely to obscure the malicious redirector. The embedded document body text contains the malicious URL and several other URLs, some of which are confirmed benign, likely to add legitimacy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=fire+burn+by+slap+dee
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/81219458301.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/tetibarisukofevalokes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/everest_climbers_guide_crossword_clue.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/kepipede.pdf
    • https://cdn.shopify.com/s/files/1/0435/8655/1971/files/transport_canada_holdover_time_guidelines_2018.pdf
    • https://static.usrfiles.com/ugd/361f4b_fbb934cd44484072856a07fceaf15b26.pdf
    • https://static.usrfiles.com/ugd/108936_067a609b98454ba68450cb7cb472dcd4.pdf
    • https://static.usrfiles.com/ugd/754d94_6564c4a02bf44adc859e27d64e3183a1.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/cell_cycle_control_system.pdf
    • https://cdn.shopify.com/s/files/1/0435/6177/9359/files/anatomy_of_human_skeleton.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/fusiform_aortic_aneurysm_ct.pdf
    • https://cdn.shopify.com/s/files/1/0440/7309/1222/files/sumo_deadlift_form_side_view.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/invitation_to_meeting_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/95816028633.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/attitude_gay_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/dessert_menu_template.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047c5.bin
06cb14d9898000788b06c8051d2092c9994535cca28b8c3540d223936f5dc3e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C5 5152 bytes
font_01_sfnt_off00005959.bin
8e233adb4c96460394b7b1d94d37c0d71e36d0a6f8cecdf0a20a33b1a4a679b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5959 10092 bytes

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