Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5bd7360711238e…

MALICIOUS

PDF

51.0 KB Created: 2020-08-10 20:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f04129f95ba1f82444b2936ecf77ca SHA-1: 9a6c2feabcae54d1a715ab305b0bfbaad5dd43ea SHA-256: 4e5bd7360711238e41c5bf858829099c6ccefd6d0b99231cae1903a90ed338f8
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector at 'https://ttraff.ru/pify?keyword=grammar+games+for+adults+pdf'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'grammar games for adults pdf'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a distribution mechanism for further malicious content. No scripts were extracted from this sample.

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=grammar+games+for+adults+pdf
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdf
    • http://pirufos.swissmountfarms.com/uploads/1/3/1/8/131871721/nigivax-xakaxuvoferar-ranotizuza.pdf
    • http://files.accesschristinahicks.com/uploads/1/3/1/4/131453402/4e8fb7903e2bde1.pdf
    • http://files.akshansh.net/uploads/1/3/0/9/130968942/9609191.pdf
    • https://cdn.shopify.com/s/files/1/0439/0063/3243/files/tenofajoxirijaxawipito.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9646434013.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/lepobeje.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/95145970843.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/4100532073.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/91309276104.pdf
    • https://cdn.shopify.com/s/files/1/0451/0813/4053/files/florida_ballot_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5067/1007/files/sujudamurajixedudolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/31047467169.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/sales_action_plan_sample_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7280/files/51324673589.pdf
    • https://cdn.shopify.com/s/files/1/0432/3177/2835/files/xogubavaxirunogosuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/burepibimexokiwitofuput.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_off00007c4a.bin
98c1e4d9b45d1878d98134922f0e07043a267ef19a4dfabda622a5da273ddc76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 5120 bytes
font_01_sfnt_off00008dc4.bin
a2afb7732c66bc0c93fb38279782d67d270eaec50245e0a735336dacab1e6435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC4 10128 bytes
font_02_sfnt_off0000b084.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB084 4324 bytes

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