Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a9ecd266d9253d…

MALICIOUS

PDF

45.8 KB Created: 2020-08-14 03:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3979a78f7359267dcd7ae3699132bbd3 SHA-1: 65b08594c18383aebe82e52d6b4e3536ae6ac116 SHA-256: f6a9ecd266d9253d6b32a906fa67abccc430b9f370c69157340979e20f555dea
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'Corrective and preventive actions report'. This redirector likely leads to further malicious content or exploits. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier 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=corrective+and+preventive+actions+report
    • http://lowoj.cognitionspeechandlanguage.com/uploads/1/3/0/7/130739349/7e26a.pdf
    • http://files.thecryingblondegirl.com/uploads/1/3/2/7/132740270/xigiworumipedin.pdf
    • http://setiwugow.dgvaluations.com.au/uploads/1/3/0/8/130814328/wodamovilujuna_jisafudaz_wisesar_fepemubutuwepu.pdf
    • http://files.alcuincollege.com/uploads/1/3/1/1/131164052/2374662.pdf
    • http://files.ps177.com/uploads/1/3/1/3/131381900/1a61bbfd7c.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/kotakikemitikazuxomebar.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/nafegitexa.pdf
    • https://cdn.shopify.com/s/files/1/0438/5836/2518/files/john_playford.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/36623381267.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/67341691369.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/43995893821.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/17073906289.pdf
    • https://cdn.shopify.com/s/files/1/0431/0469/8535/files/access_bars_tehnika.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/77687871016.pdf
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/multiplication_coloring_worksheets_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/class_12_biology_chapter_1_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/bemaxo.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_off000068eb.bin
e806185e9a4bfcac0d393b8143c69f0fcdf821ae441885512dc72de8cfdc178a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EB 4904 bytes
font_01_sfnt_off000079a2.bin
8f78f0cbe8201ddaf79c34eb26cf25b944ed9a2ea6c1eab002e2d2b66e8edbb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A2 10044 bytes
font_02_sfnt_off00009bcf.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCF 4324 bytes

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