Malicious PDF — malware analysis report

Static analysis result for SHA-256 82807d81f3de7390…

MALICIOUS

PDF

50.0 KB Created: 2020-08-08 17:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7a0c38ae0d46f9ba03c54bdd164a027 SHA-1: 6d0f1eab35d8b72dbdd687c6a6b4a409d0597fc9 SHA-256: 82807d81f3de7390e6b168b82ad508582daead8992ae40ec7726e8e748b864b4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the document body, though heavily obfuscated, contains URLs pointing to potentially malicious infrastructure. The presence of many links suggests an attempt to drive traffic to external sites, likely for phishing or malware distribution.

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=agree+disagree+essay+structure+pdf
    • http://sujepo.quantrylaneart.co.uk/uploads/1/3/0/7/130776460/a63f386.pdf
    • http://files.claremooredesigns.com.au/uploads/1/3/0/9/130969037/d8e53f.pdf
    • http://livoz.talesbyataillesscat.com/uploads/1/3/1/3/131380480/getukigomu-vomaniviv-sexolewunekapa.pdf
    • http://files.brockskennel.com/uploads/1/3/2/8/132816195/abd7f.pdf
    • http://files.ragbagantiques.com/uploads/1/3/0/9/130969469/8169755.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/kambikuttan_novel.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/17954158695.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3240/files/pezamisamegusavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/77616902400.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/jazizulepa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/78047967040.pdf
    • https://cdn.shopify.com/s/files/1/0436/7666/3961/files/86812993214.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/77214252917.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/levaxanurupuxetojike.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/67262395743.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/printable_expense_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/luzigolatamep.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/44444093902.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_off00007255.bin
d6b959593ae9e11b8bbbe7731bdc77186b7d2e092d181218bbdde093b110b80e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 5048 bytes
font_01_sfnt_off000083a6.bin
a2bfef6ea56383eafeabefb50b67e65b09a637438d76214ba5075bba3331d28b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 15092 bytes
font_02_sfnt_off0000acf8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACF8 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.