Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c585703005c45f…

MALICIOUS

PDF

36.5 KB Created: 2020-08-19 18:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d31a7b96a122876cdb424a0887bd756 SHA-1: 020317792a154e81ba04767e0d3fd9348e9d4c72 SHA-256: 60c585703005c45fae37b48eb1403d152b4913de45dcba8b2b38ffe2fd7b3f51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, masquerading as a movie download, which redirect to a malicious link farm. The primary malicious URL identified is ttraff.cc, which is flagged as a known redirector. The ML classifier also strongly indicated maliciousness.

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=south+movie+2018++300mb
    • http://files.masonscreativecatering.com/uploads/1/3/1/6/131606739/2960225.pdf
    • http://debobi.prideandjoymonogram.com/uploads/1/3/0/8/130814328/3fb41ce.pdf
    • http://fimikax.another-bright-idea.com/uploads/1/3/1/4/131452958/dekuseve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/2772972591.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/index_match_from_multiple_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/ielts_speaking_part_2_questions_and_answers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/97482270672.pdf
    • https://cdn.shopify.com/s/files/1/0449/4393/3595/files/nanuwigupogog.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/76088211320.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/rijofig.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/52823472818.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000430b.bin
95091bd484d441c9c771f4fa78e66003955b435dd9f64c63186dcc63f1ef6d90
pdf-font-stream PDF embedded font (sfnt) at offset 0x430B 5172 bytes
font_01_sfnt_off000054b7.bin
465fedf4fcb166735304e2c2a7910a043174aa205e301da3aceaf02639552dda
pdf-font-stream PDF embedded font (sfnt) at offset 0x54B7 10248 bytes
font_02_sfnt_off0000777f.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 4324 bytes