Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdda9bfe68ec6679…

MALICIOUS

PDF

33.4 KB Created: 2020-08-07 08:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e7a93560a22dd81cb8526c4dcfb6ef4 SHA-1: fc3ae9a73ef963bef365ccfac1a51b9b686d6734 SHA-256: bdda9bfe68ec66796f8409c3e75103ac7d12c30768a2bc9e0c21738c6e300d18
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=human+body+parts+chart+pdf', is designed to lure users into clicking it under the guise of a benign document. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The primary malicious URL is the most critical IOC.

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=human+body+parts+chart+pdf
    • http://files.porterridgeband.org/uploads/1/3/0/9/130969565/duwunuxepugegoxetig.pdf
    • http://files.givshighcaliberbeagles.com/uploads/1/3/0/7/130775921/nabuxekozeluri-wosegore-zotivuluk-sexesidav.pdf
    • http://files.palmbayclub.net/uploads/1/3/0/7/130775831/tanik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/google_materials_colors.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/intermediate_time_table_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5068/0991/files/fall_out_boy_ring_tone.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/buzugijutupapaguv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/agenda_2020_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/melunovufevu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5637/2641/files/wexiweradoxasifowupeda.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/14251979946.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/27173623749.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/bavomitesema.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/76836976598.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/pivizirusamagutorud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/33564753027.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_off00004613.bin
51c04d221162a4351e10f86417a9cd1c03fd6f5eab088eaa62199a0cde1c58c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4613 5564 bytes
font_01_sfnt_off000058ce.bin
d7fa32d4830b02158be962eabbaf13bb6817e0c6173fbe4e6c98057562a362e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CE 9428 bytes

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