Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0e3b68884e28ce…

MALICIOUS

PDF

42.8 KB Created: 2020-08-19 18:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd768ab3afb26b2b9cb50f786aa463ac SHA-1: 7c79b8339b171f0867f90dc96a1d885447f85987 SHA-256: 0b0e3b68884e28cea8d899a99b4e7c5e11d5cdf1fa408cdca70c532d8c63fc5d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine rankings or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=django+form+placeholder+template
    • http://zazif.wintechfrance.com/uploads/1/3/1/4/131406390/kerunapubilab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/8866807272.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/divination_wizard_5e_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/sazoja.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/lirodovor.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/pugobosumowebom.pdf
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/erosional_landforms_coastline.pdf
    • https://cdn.shopify.com/s/files/1/0435/9444/9055/files/holt_mcdougal_chemistry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/21436853090.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/41557793955.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/zetejijop.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5920/files/waximaturesuk.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff9.bin
06a2d1aadc61b339f693e14f5fec77e075e2aa9c9c550e405158f0efcf47ce53
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 5464 bytes
font_01_sfnt_off0000726f.bin
4825d7b68c34fe8d56d19935a4709f7656d4bfd7853e040460e61cb3e56a0e9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 14176 bytes