Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a4a560caead606…

MALICIOUS

PDF

63.9 KB Created: 2020-09-30 11:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f27ba03d56483c1eeee65602346c2b69 SHA-1: dcce5ab99e68ca54b3e653953d7be150df2cf1d6 SHA-256: 29a4a560caead606a31bfea7e39a80ff59b076503d69777c78ddc410ea226907
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links pointing to various domains, many of which are identified as part of a link farm and redirector infrastructure. One critical heuristic indicates a direct link to known malicious redirector infrastructure at 'https://ggtraff.ru/strik?keyword=hindu+gods+family+tree+pdf'. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=hindu+gods+family+tree+pdf In PDF document text
    • http://dodit.destinationenvp.com/uploads/1/3/0/9/130969663/gujogefefobewikera.pdfIn PDF document text
    • http://files.odbijelihandela.com/uploads/1/3/0/7/130775654/bodimofosaworome.pdfIn PDF document text
    • http://rafun.pninax.com/uploads/1/3/1/4/131453960/jemivilefepurun_gutevikibaga.pdfIn PDF document text
    • http://files.larryssportsexchange.com/uploads/1/3/0/8/130874128/folerezome.pdfIn PDF document text
    • http://files.qaylulahcomo.com/uploads/1/3/1/4/131437615/luwabinesetaxu_xuzemadavufu_bapidozabu_sudufuxipitumo.pdfIn PDF document text
    • http://files.richardpartis.com/uploads/1/3/0/8/130874413/9ddf400.pdfIn PDF document text
    • http://files.grandparentsforsocialaction.org/uploads/1/3/1/3/131398091/22327273c.pdfIn PDF document text
    • http://jipuni.hirchert.com/uploads/1/3/0/7/130776885/7428751.pdfIn PDF document text
    • http://files.globalafricancreates.com/uploads/1/3/1/4/131437865/totuponamonate.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ae66.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ae66.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000e44c.bin)
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/merenojofoturewugigov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/8830332323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/bsa_cyber_chip_blue_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/fivezafajoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/thermodynamics_8th_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f915770-6d23-4eb5-8ac8-99f4449dee39/fokuleverusisarefafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7a4bd2-72cb-44c4-9f5b-fdf111c5400c/19346718645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0470ecba-b886-45d8-b6b5-35cc0a9aa5af/riwekutawijol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ef3b69-9a21-4778-a58c-91c3ecfae8b2/zojitedoxumonekox.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000ae66.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE66 5304 bytes
SHA-256: c58b661d98668011134c5f993ffb709be2c8c093e102898f2a5e526c3e0adf37
font_01_sfnt_off0000c05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05C 10552 bytes
SHA-256: f5acc4c4eca3b89848ea44c834be6aff6ab6e23770c49a6e4f5422d30996f57e
font_02_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e