Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf317b13faf996e…

MALICIOUS

PDF

47.0 KB Created: 2020-08-21 15:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0ee74e393841932ee8cc42b13fbd576 SHA-1: f647237933879caf2723b4f2091c3f6cce43b0ce SHA-256: daf317b13faf996e2932d60d5dc8225876a03dbd8c91a43b7bb563dacec0d864
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, includes the URL 'https://ttraff.com/pify?keyword=introduccion+al+budismo+libro+pdf', suggesting a lure to a phishing or malware distribution site. The presence of multiple embedded links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful 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=introduccion+al+budismo+libro+pdf
    • http://bewev.lastoutleatherco.com/uploads/1/3/1/8/131856333/dexawodapawamosim.pdf
    • http://files.oilsetc.com/uploads/1/3/2/7/132741535/zupuweladexetew.pdf
    • http://wikusuwu.tannerfriche.com/uploads/1/3/0/7/130740178/rujosedewagud_zexojufa_xawexan.pdf
    • http://files.stauderwood.com/uploads/1/3/1/8/131871762/9572179.pdf
    • http://galitemuf.montessorianakku.com/uploads/1/3/1/1/131163651/wegem_febenopef.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/7910673620.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/84130775150.pdf
    • https://cdn.shopify.com/s/files/1/0438/2277/6477/files/cervical_cancer_testing_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/import_stylesheet_in_html.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/darkness_rises_gear_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/74310529479.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/lozedapufiride.pdf
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/zoology_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaxolaxowixinetubosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1126/files/30700049305.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/vert_shock_week_3.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_off00006920.bin
013cb2c8e0241f98051bc69ad1006165f714d3a104a0a2d183dca6396ef704ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6920 5144 bytes
font_01_sfnt_off00007a6a.bin
7b297eee3a668c496fe9c0189045cc20c9129a696a5b7c99141d7926e41ac0ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6A 11232 bytes
font_02_sfnt_off00009f27.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F27 4324 bytes

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