Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46bf23a3f5ed7bc…

MALICIOUS

PDF

51.9 KB Created: 2020-08-24 21:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c76964a08fb110c94727d397a041edd0 SHA-1: 849efef4a6bacc914c5d9c09e160b9e064dc83c8 SHA-256: d46bf23a3f5ed7bc47ee10bd8518486e7d26e81dd948154b5873698250601de6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by an ML classifier and contains a link to a known malicious redirector, ttraff.com. It also features a large number of embedded links pointing to PDF files hosted on Shopify, suggesting a link farm or distribution mechanism. The document body contains garbled text and the embedded URLs, indicating a likely attempt to disguise malicious activity or exploit SEO techniques for distribution.

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=despise+verb+forms
    • http://files.carterrod.com/uploads/1/3/1/1/131163836/a76fafc2fd.pdf
    • http://files.tenderheartsdaycare.org/uploads/1/3/1/4/131483034/kisowozawuk.pdf
    • http://files.kysscouncil.org/uploads/1/3/0/7/130739742/848de7b.pdf
    • http://refopa.bessastadir.is/uploads/1/3/1/4/131453293/sibiju.pdf
    • http://gejelexo.annscrystalgarden.com/uploads/1/3/0/9/130969600/9872683.pdf
    • https://cdn.shopify.com/s/files/1/0449/5107/7032/files/lingering_soul_5e.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5829/files/85860568247.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/96178209219.pdf
    • https://cdn.shopify.com/s/files/1/0436/0057/6669/files/nuvoxagepoposos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/catecismo_catolico_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/april_2020_calendar_printable.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/boriwopumekebupepagine.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5574/files/leisure_time_reading_passage_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9872/5793/files/29287681801.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/ap_grama_sachivalayam_results_merit_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/8513/3992/files/social_media_metrics_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6454/files/5315240639.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c94.bin
7e2d80a90214bf256685d7d3e21c9e3c94f0404dde0f612c9d02737a28243fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C94 5004 bytes
font_01_sfnt_off00006d83.bin
5e9fc1b743697764dae1673e472f5b22b952ee9551ada681026e399e61526e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 8644 bytes
font_02_sfnt_off0000856f.bin
da90e32dfb9c74c37015fe4153b268b2b2e410d7396ab6875b4cea226f25050a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856F 10520 bytes
font_03_sfnt_off0000a9b3.bin
29a6bfd8b731ceb4c865632034bd5c63656695694dd166f25dba0ab9dfccb8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B3 17064 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.