Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c6c358b8d7b028…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 03:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3925926ecc71744a6176757b92ba3391 SHA-1: 1adfe773fd660a343a1c74b413a3ba03e853f332 SHA-256: f2c6c358b8d7b028ba708e5d7177c0ff767a57fbaed879887e799cd756ad36b5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'aviation safety standards pdf' and includes the malicious URL, suggesting a lure to trick users into visiting a malicious site. 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.ru/pify?keyword=aviation+safety+standards+pdf
    • http://files.alcaeagles.com/uploads/1/3/1/0/131070080/witorel.pdf
    • http://ribejajo.jandbminifarm.com/uploads/1/3/2/6/132681670/geribe.pdf
    • http://files.davidfagan.eu/uploads/1/3/0/8/130814432/mopujazukunawi.pdf
    • http://foroduzi.gracebaptistchurch77.com/uploads/1/3/1/1/131164250/nexaxomomavuvox_pubufekege_zeraluzisa_nelivit.pdf
    • http://xeduv.thehistoryenvelope.com/uploads/1/3/0/9/130968917/1086336.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/vilebarik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/fallout_3_d3d9._dll.pdf
    • https://cdn.shopify.com/s/files/1/0437/8807/5159/files/verizon_data_breach_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/algebra_6th_grade_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/homelite_super_xl_chainsaw_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7566/6073/files/complete_beatles_chronicle.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/actos_administrativos_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/vojozunamiwipepajebozilo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/desexiverijebana.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7938/files/vetasemizuterewomavofaref.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/gutozoxumigamububotipudu.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_off0000754a.bin
c6e334d0233e9407bd8c9150b61ee4da2088daafa5acb6450e0746699fadf275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754A 5156 bytes
font_01_sfnt_off000086f1.bin
87f80fb6b1bde2ffe61c5304cd7e8921c4d920d47985eee24bfa7e5b4468f5f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F1 10284 bytes

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