Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed867c9824131c4…

MALICIOUS

PDF

45.0 KB Created: 2020-08-27 18:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db9c9578bf16b04bf4e0bf532d13541b SHA-1: 8a3f905e31a72e4d6eba6affe1d2dbfdb07dd21b SHA-256: aed867c9824131c4a81aa2e2b94d0b3612adf0bf2fe2810a712df2d7fc513339
152 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a helpful document about Gmail folders. The primary malicious URL, 'https://ttraff.cc/pify?keyword=comment+cr%25C3%25A9er+un+dossier+dans+gmail', is designed to redirect users to a harmful destination. The file also hosts a large number of other PDF links, many of which point to Shopify domains, suggesting a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=comment+cr%25C3%25A9er+un+dossier+dans+gmail
    • http://files.seacon.um-sml.com/uploads/1/3/2/6/132683111/6300921.pdf
    • http://wujudeteb.creativeframingvirginia.com/uploads/1/3/0/7/130738591/tipujowa.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/tezuxusawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/48257507469.pdf
    • https://cdn.shopify.com/s/files/1/0440/5847/6694/files/medical_careers_list_a_z.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/collating_reports_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/sugep.pdf
    • https://cdn.shopify.com/s/files/1/0429/0363/4079/files/vulebiki.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/sheet_silicate_structure_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/college_physics_serway_vuille_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/2088/3880/files/62273765631.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/kamasefedepolilezugug.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_off000059c8.bin
af4db7d61fe3bd5072a374c4bc95b72c1ba0436125f628cd52945d5a2913f300
pdf-font-stream PDF embedded font (sfnt) at offset 0x59C8 5308 bytes
font_01_sfnt_off00006b6b.bin
984d5270828b8b4b2af612e2355fefec7e588906a18397f3a605301600bd66cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6B 11680 bytes
font_02_sfnt_off00009008.bin
700ff7bf493bf9bab5e7bd19ce07725d6ad682c9ec1bd4c381fbd4d74ba1924a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9008 16088 bytes