Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aefc0317fe93350…

MALICIOUS

PDF

38.5 KB Created: 2020-08-09 06:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011940b2a598c42d8398658b3ac55743 SHA-1: 4302247f138c005a2d6a6cf7774612dba16fa763 SHA-256: 8aefc0317fe93350fb647e7b18535a861bd92d4a479d0ce4ccf83358f131f58a
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=destination+b1+pdf+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C', which is likely used to redirect users to a malicious site. The document body contains garbled text but also includes the malicious URL, suggesting an attempt to disguise or embed malicious content within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=destination+b1+pdf+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C
    • http://pemega.thenatureofthecosmos.com/uploads/1/3/1/4/131452922/pamadut.pdf
    • http://files.toptechelectricalproducts.com/uploads/1/3/1/6/131606397/puwebuka.pdf
    • http://files.cityofthayer.org/uploads/1/3/0/8/130874143/temefi_lojokiwipobepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/chemistry_lab_manual_timberlake_9th_edition_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/pokemon_290_pokedex.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/ronitabone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bukidesokat.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/cultivo_y_crecimiento_bacteriano.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/93153258282.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/77310275780.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/gijuda.pdf
    • https://cdn.shopify.com/s/files/1/0447/7979/8679/files/midusiwebavukuvareselan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/wupuvazuwide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/anhedonia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/yamaha_outboard_service_manual_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/cell_block_cytology.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_off00004c43.bin
acf7e2ec70824846952f41f633b13d6fe84560509846c0565edeb1202b4fcaae
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C43 5728 bytes
font_01_sfnt_off00005f4d.bin
586c58d4fae60c6da49d5e38b1db10c1964ea485fac50d0b56f1463cd5a52376
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4D 13748 bytes