Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2886e2da9736f6…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 05:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 867c8670a2bcd1eccbfb186b24f2d2e5 SHA-1: afe0c3ca7b0e099b838fb8ae7e0575f9ef3434dc SHA-256: 5c2886e2da9736f6df0a0b5b00ad5a02ba6a7b8da7a3746c80780af3a7da61b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document uses a lure of a 'whistleblower transcript' to entice users to click on embedded links. One of these links, 'https://ttraff.com/pify?keyword=whistleblower+transcript+document+pdf', is identified as a malicious redirector, indicating the document's primary purpose is to lead users to malicious infrastructure. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.com/pify?keyword=whistleblower+transcript+document+pdf
    • http://files.erikasenecal.com/uploads/1/3/1/6/131606467/modug.pdf
    • http://files.bmystiic.com/uploads/1/3/0/7/130776336/fanolimubu-kunuraxi-pebebebudapi.pdf
    • http://files.thehoneybcompany.co.uk/uploads/1/3/1/4/131407164/kazevolugine_jevibureworukex_xeniwa_kirew.pdf
    • http://files.canaseragafestival.com/uploads/1/3/1/4/131454304/kaliwojexutamejame.pdf
    • http://files.melissaelayne.com/uploads/1/3/2/3/132303001/ruvosoxad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8197/1365/files/difivimopojibekeridifimuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/notopofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/69657627178.pdf
    • https://cdn.shopify.com/s/files/1/0436/2626/6782/files/virtual_machine_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/55342551874.pdf
    • https://cdn.shopify.com/s/files/1/0433/3813/7755/files/dinetuwuvelupul.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/2008_nec_code_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/gidakuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/dijetozadufawigawenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/cisco_commands_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/raxewuva.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_off00006727.bin
97c4e0157c143b0531376a96aacf1dab7068d6316bf98d802da270eade1d543d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6727 5640 bytes
font_01_sfnt_off00007a3b.bin
f9b7a8c5f335a625e3b3efe5940da5ac27b913e9e137030b49ed34e578729015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 9960 bytes

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