Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09b967906e04ae6…

MALICIOUS

PDF

43.8 KB Created: 2020-09-01 02:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de57c89acc43c4bf9b055bd680a6e862 SHA-1: 3044bdc212b10ff829a451a1ac066bec776948ab SHA-256: d09b967906e04ae64f650ca43a7ca68717e5adf910b7b331ab0e86dd70e5b836
152 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.cc/wix?keyword=about+us+page+for+android+app', points to known malicious redirector infrastructure. The document's structure and extensive linking suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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=about+us+page+for+android+app
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/kibatemumufiliwuvub.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/kefukepojuwugoturapomakap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wojifuxazax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/nudurezijawanugikex.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/adultery_case_judgement.pdf
    • https://static.usrfiles.com/ugd/8a419d_628144f149ea4b67ac811692a5cf0027.pdf
    • https://static.usrfiles.com/ugd/a107db_f38d0e31dbb6469ebc2d14bdd54598ff.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/bach_cello_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/chemical_composition_of_bacterial_cell_wall.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/99764829181.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/dyspnoea_12_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/area_and_perimeter_of_square_and_rectangle_worksheets_for_grade_6.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_off00006e0e.bin
f17e1167feca09374d8f538624fc8c60482aab1ad02f2bb10264025d7347274e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 5308 bytes
font_01_sfnt_off00008026.bin
7c5c8c93917d3be8f3b0cbc48e7736f59e94270ceef2d983ab1ee7c7d0fe858a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 10084 bytes