Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7e331c8be7ae7f…

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 21:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f73da26d7b22d7e0b877890478bcc412 SHA-1: 0e521898b83a1bc5ecbcd8abe800c92b8bb587d5 SHA-256: 7e7e331c8be7ae7fd0f98ccf39ccaa9951eb734ece11aa760095aa79698064dd
152 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.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded URL and the link farm indicate an attempt to drive traffic to malicious or spam-related 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.cc/wix?keyword=edtpa+task+3+assessment+commentary+examples+math
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/15009131953.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/19719705075.pdf
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/74480212492.pdf
    • https://cdn.shopify.com/s/files/1/0448/7577/6167/files/accounting_equation_debits_and_credits.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/17113345687.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/rubmaps_login_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/gubezozaponezudosaneti.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/waterfall_chart_ppt_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/dream_interpretation_john_paul_jackson.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/gojakazejizan.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/sijojefiwebajajupolivoz.pdf
    • https://static.usrfiles.com/ugd/575363_c468d34614f544009550549179117c8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_78aef49564a54b329de65c8ff2ba92c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d459e0df3594179a2af038a8a62afd7.pdf
    • https://static.usrfiles.com/ugd/0e2875_9002b9debc1f4eec999271c90e7f0b4b.pdf
    • https://static.usrfiles.com/ugd/286fb8_6798fc85bdb94124b64ef3b4024e223d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073db.bin
0fb632cb0f5950ffe0f9d3d385c8d668c3f16afe086972411b60188a4a2d9bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DB 5408 bytes
font_01_sfnt_off00008618.bin
8adde7d367f3a572bf06f72d029c9821f44d1b6f2b24b4d87cdfeddfa8a81a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8618 9912 bytes
font_02_sfnt_off0000a7fc.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FC 4324 bytes

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