Malicious PDF — malware analysis report

Static analysis result for SHA-256 2936606741ccc3fc…

MALICIOUS

PDF

40.4 KB Created: 2020-11-09 16:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a597645398dc6cabcb7a5bdfa68c1d05 SHA-1: 786ddd46457038af127dcca01a6a9841ce0e578a SHA-256: 2936606741ccc3fcede54b61f7eda20e7402e980bf19477ccc97c0b1da0abf96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector to a malicious URL, indicating it's designed to lead users to harmful content. The embedded URL 'https://ggtraff.ru/aws?keyword=google+calendar+import+ical' is identified as a malicious redirector. The document body, though partially garbled, contains text related to Google Calendar and the malicious URL, reinforcing the lure.

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://ggtraff.ru/aws?keyword=google+calendar+import+ical
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/fd46e57ac9e.pdf
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/7518724.pdf
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/jezowogabusot_dajuxax_peloxidinivolup_foxilabeleturak.pdf
    • https://panenojaro.weebly.com/uploads/1/3/4/4/134482399/216529.pdf
    • https://xafasujogi.weebly.com/uploads/1/3/4/3/134374351/24289392a249d.pdf
    • https://nofakefol.weebly.com/uploads/1/3/4/3/134341926/fdba9d64.pdf
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/zefaxit.pdf
    • https://muwidewosavuli.weebly.com/uploads/1/3/4/4/134435377/bivevanilimimifatixu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jolufozo/9201540351.pdf
    • https://s3.amazonaws.com/rawesaragegugar/words_that_start_with_the_prefix_hypo.pdf
    • https://s3.amazonaws.com/saziwijaxodav/mfe_stock_chart.pdf
    • https://s3.amazonaws.com/megodipewukitoj/basic_english_reading_practice.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_off00005f08.bin
e19ffcbb9053de4ac30f03ee109d19839aec72ae3a051d15843dc5e8cbb3aaa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 5248 bytes
font_01_sfnt_off000070ce.bin
4595d8615593a1f3a965130a9a1c4e08b5fa7a2a7052aaeb82348d8487b076b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x70CE 10632 bytes