Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae958931d42fe8b…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 01:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b20e5e2ff8d1c6a8521bff5d289a0f6 SHA-1: b21e07669cee22ae68b8a2f9d4b871ae88bbf7c5 SHA-256: cae958931d42fe8b71ccbd5eb3d0db8b22daa8291c07b1f1bb27b1a117307265
152 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and heuristics indicating malicious redirector links. The document body contains a title related to CNC machines and embeds a large number of external links, many pointing to Shopify domains, but one critical link directs to 'ttraff.cc', a known malicious redirector. This suggests the document is designed to lead users to malicious sites through a link farm.

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=axis+identification+in+cnc+machine+pdf
    • http://files.algomabaptist.com/uploads/1/3/0/8/130874360/ecdf04.pdf
    • http://files.shinechiro.com/uploads/1/3/1/3/131379409/denunipen_nerebibo_wilag.pdf
    • http://files.jackjmatthews.co.uk/uploads/1/3/1/4/131437756/roterumeva.pdf
    • http://bifuj.3lasadu.com/uploads/1/3/0/8/130814017/dejuzufe_mutosujosezisu_xizikogumezaze_vabixe.pdf
    • http://files.wildsoulhealing.com/uploads/1/3/1/8/131856163/34218f0.pdf
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/8019742369.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/22050897306.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/559923516.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/how_to_create_directory_in_terminal.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/biopsychosocial_assessment_template_social_work.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/gexanukipekonadizopup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/the_legend_1993.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/wipinarupalobazikepobe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/xajezokewonexozufer.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/16025807866.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/32233963812.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_off00006bce.bin
b716b51fc8e12f5ca8967d62b6a07a911d87304eab6d1262762268cc32583ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCE 5112 bytes
font_01_sfnt_off00007d03.bin
172837d2966826592fb343342f641186dcffa9951093e044f248b8d773887f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D03 10048 bytes
font_02_sfnt_off00009f5f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5F 4324 bytes

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