Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b559d1702b5ab25…

MALICIOUS

PDF

36.8 KB Created: 2020-08-14 16:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0038f0da584557cb1378e8eff6d7115 SHA-1: b01492f7e47c7fe4094245c4d23b982751cd2e3a SHA-256: 8b559d1702b5ab25384e20e49d51e8407a68690736228f3f2aeb6d3c6dbd25f1
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to manipulate search results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the link farm and redirector strongly suggest a malicious intent to lure users to harmful sites.

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.ru/pify?keyword=kishoreganj+district+weather+report
    • http://mexanilis.redfishstalker.com/uploads/1/3/2/6/132682137/9fd01114.pdf
    • http://files.createdheavens.com/uploads/1/3/0/7/130775292/firapusikojosed_zekonifebuzexak_pixigekuxiw_serudumer.pdf
    • http://nuxatimum.schoolofenvironmentalleadership.org/uploads/1/3/0/8/130814328/9962448.pdf
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/11714965524.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/nupukaninixosi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/student_council_speeches_examples.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/38870509186.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/amor_propio_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/scoreboard_command_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/gojexamakinomenexida.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/aidin_salih_yitik_ifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/welcher_ebook_reader_fr.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/57785468194.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/32570974636.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/xp_agile_methodology.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/
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/xp_agile_methodology

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005102.bin
517ca43cfb19ce5d94828e0850c6e03ecdad1c42dae95175f0cb4ce6011d2aae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5102 5440 bytes
font_01_sfnt_off00006399.bin
eef0d11181d02e05e00d11a8394a561440816006152d52a12e06b8c41df55c5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 10360 bytes