Malicious PDF — malware analysis report

Static analysis result for SHA-256 14afbf26484b145a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-21 15:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af725ff197eb25da9194a39524f27a86 SHA-1: 061d5bfd6e87ed0407857c9492be6b98013b96d0 SHA-256: 14afbf26484b145ad5bd354aa2bf638849eea058c1b7b1ca05d821b163d93993
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body also contains a direct link to this malicious redirector. This suggests an attempt to direct users to malicious content or phishing sites.

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.cc/pify?keyword=android+support+library+mixing+versions
    • http://files.rocketcitygarageservice.com/uploads/1/3/2/6/132695354/pogozol-lurosamigikires-jekiguzibedi-dizogaja.pdf
    • http://xewitil.monamoody.com/uploads/1/3/2/3/132303195/89918.pdf
    • http://files.columbuscoasterco.com/uploads/1/3/1/3/131379761/tarivadowida_fokal_jaliluvenajot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0461/8348/1507/files/contact_list_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0445/8368/2212/files/chuyn_file_sang_jpg_trc_tuyn.pdf
    • https://cdn.shopify.com/s/files/1/0436/1263/5298/files/rikuxoramanowagup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/71979632585.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/batesebosetutera.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/punipi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/download_ableword.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/ruxakiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/7789/4293/files/siuda_gramatyka_angielska.pdf
    • https://cdn.shopify.com/s/files/1/0439/4044/6366/files/xodujomezexu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006383.bin
38d13697928b1cd3cbde159b3c3a1bdfb7c7a13d93cf82e7714db25a072cc0e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 5520 bytes
font_01_sfnt_off00007630.bin
dbfb10a9f9ee05a64754050e04754ac7dd4e699904aa653238643e751e4fef61
pdf-font-stream PDF embedded font (sfnt) at offset 0x7630 10456 bytes
font_02_sfnt_off000099db.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x99DB 4324 bytes