Malicious PDF — malware analysis report

Static analysis result for SHA-256 789b9f9f868c50fe…

MALICIOUS

PDF

36.4 KB Created: 2020-08-30 04:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2847184a2575d1a4e3619bccd1e0fe84 SHA-1: 9ec43832134289f5e1002273eec414a8766905c5 SHA-256: 789b9f9f868c50fed324d1140dcc087c9971b56d2b2d2703a9191e69eb97c642
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector infrastructure. This suggests an attempt to lure users to malicious content through a link farm, likely as part of a phishing or scam campaign.

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/wix?keyword=harz+conan+exiles
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/9487/0935/files/givegusodurenovulubelupek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/69227978482.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/civil_engineering_books_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/36187058145.pdf
    • https://static.usrfiles.com/ugd/d3758e_f84dbb46cbd2434da6688ca1f6a31f73.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/analtica_web_para_empresas_arte_ingenio_y_anticipacin.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/nukoxodomi.pdf
    • https://cdn.shopify.com/s/files/1/0448/0057/3601/files/demip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/nizakidojetotinaxal.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3ff1f96ac4e4a24bc5ccdc4a0ac3321.pdf
    • https://static.usrfiles.com/ugd/0049ca_2a7cb835935447259fc47b4f75567940.pdf
    • https://static.usrfiles.com/ugd/b8c837_b30317aaa5564d66978070745cb83036.pdf
    • https://static.usrfiles.com/ugd/b8c837_99fe961d527c40e48348b34a240f6a04.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_off000052fa.bin
37fa024d61732c7573266399f6884236e7f6d9335cf1cff013a2f5e430ce2fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x52FA 4872 bytes
font_01_sfnt_off00006396.bin
a84a8a94685dbe652d46b4d2d4d2242c5246a60da4532586f6c21da683c7c782
pdf-font-stream PDF embedded font (sfnt) at offset 0x6396 9972 bytes