Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd74ccb0b79f98d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 04:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e9092f74ad69c99300a20bc4fd774e SHA-1: d2504ca387c8ebc8085e1109e721703d56d14d0f SHA-256: 5dd74ccb0b79f98d8311ab19aa1c00eefd4108fa5ad4dc00ce7a4be9da66fd25
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same redirect URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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/wix?keyword=classic+wow+pet+attack+macro
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5c30d21a8b8c4586b5e78b68638c2b08.pdf
    • https://static.usrfiles.com/ugd/1a89c8_8cb060a259a9414584c4875a9ce1f376.pdf
    • https://static.usrfiles.com/ugd/3bf302_6959fb74cd2f47b9bdc4adcd6231a183.pdf
    • https://cdn.shopify.com/s/files/1/0447/9424/9377/files/calendario_2020_feriados_ecuador.pdf
    • https://static.usrfiles.com/ugd/b8c837_de70664321e94bd5ae1b2183916fa764.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d26706714284b4f9fb624b41232f538.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/povetuxegiwipuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/50429470779.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/91413275760.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/tobadavepekikorije.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3883/files/free_piano_sheet_music_la_vie_en_rose.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_off00005fae.bin
f759a88fa4763fd24a094cdfb27b8ba6d4f30c14e357a76770bbc34d99b07f08
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 5140 bytes
font_01_sfnt_off00007126.bin
7cc8cab5433512acfb87bb4a6c28095b1ceb2b5ffa04fb72d780f65148b5d66f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7126 10636 bytes