Malicious PDF — malware analysis report

Static analysis result for SHA-256 86da32c1081d7b39…

MALICIOUS

PDF

40.6 KB Created: 2020-08-08 18:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9fb9a2b941176ff9fe47854e14c1e23 SHA-1: 7290ba34c54b350b780f4b93ccc1bca77ea9a102 SHA-256: 86da32c1081d7b39edbb5a9943c2b288dc035af14b717432c32e3858c11b95e3
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The document's content and structure suggest it is designed to lead users to malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=simon+says+commands+pdf
    • http://files.georgefishes.com/uploads/1/3/2/6/132696146/a319f08930.pdf
    • http://merab.sunshineselfcatering.com/uploads/1/3/1/4/131438464/4452520.pdf
    • http://files.youthgolfersoutreachprogram.org/uploads/1/3/1/8/131856672/e7b19bbf5.pdf
    • http://xopuwiz.bazowska.com/uploads/1/3/1/0/131069934/weluleviwun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/leximozetikoragiwote.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/tokutogabiganetutix.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/sozuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/37364130874.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5195/files/48753925623.pdf
    • https://cdn.shopify.com/s/files/1/0432/1594/5890/files/atos_administrativos.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/26317907007.pdf
    • https://cdn.shopify.com/s/files/1/0434/2133/5702/files/2822669439.pdf
    • https://cdn.shopify.com/s/files/1/0428/4032/6300/files/dumuwilagopexaduzogeginer.pdf
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/xbox_game_bar_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/vazigezudifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/gimp_blur_background.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_off0000628a.bin
1869cd1e9cd8813702bf0b0abbcfcbca986c65af5bb58fa3782d45ca82295929
pdf-font-stream PDF embedded font (sfnt) at offset 0x628A 5380 bytes
font_01_sfnt_off000074d4.bin
4e1f532e156d63a7b0db637695a785685782e905ee4131baf2523ff1a201bee2
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 9688 bytes