Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ec87e052c670a3…

MALICIOUS

PDF

41.1 KB Created: 2020-10-16 21:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d0cc0aabb88059afb76c138455e38a2 SHA-1: a1eeb2d43ea5be546f5e7197483c87d206981bf5 SHA-256: 46ec87e052c670a300d31d1f29b724217e77800a5843e8ccd6fe45545e9805e9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'game of thrones board game cards pdf'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted from this sample.

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.me/123?keyword=game+of+thrones+board+game+cards+pdf
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/3879004.pdf
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/wagetigob_baweduwoz_xoxupuv_nifox.pdf
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/ead64c6e.pdf
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/2531199.pdf
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/8891251.pdf
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87367999f19.pdf
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f89b35ea42a7.pdf
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f882e8912047.pdf
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f88babcafe53.pdf
    • https://cdn-cms.f-static.net/uploads/4366965/norm
    • https://cdn.shopify.com/s/files/1/0266/7639/6227/files/doberman_poodle_mix_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0495/9685/8520/files/gallery_vault_apk_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0479/8237/9164/files/rutisakuzadilijefarep.pdf
    • https://uploads.strikinglycdn.com/files/bbde3f3c-1556-4920-8ba3-e8fad8e5464e/74218768568.pdf
    • https://uploads.strikinglycdn.com/files/1a152e2a-fdc6-464b-bdbd-8b502f8292b2/72120337138.pdf
    • https://uploads.strikinglycdn.com/files/19493ad9-0ea2-447f-a84e-d760b617edb3/1790070661.pdf
    • https://uploads.strikinglycdn.com/files/cae10592-4098-406b-9828-a5c22cd6a3be/xorineladutisota.pdf
    • https://uploads.strikinglycdn.com/files/8b9c767a-5051-481b-a806-d88ded7f911d/36346900588.pdf
    • https://uploads.strikinglycdn.com/files/799fc40a-71cc-40c4-ad55-47e460bf0d4d/vumobewefoxisupopogutod.pdf
    • https://uploads.strikinglycdn.com/files/c1ad37cb-f54c-4077-a5c1-693f5948bab0/ruxubekuvimugajizol.pdf
    • https://uploads.strikinglycdn.com/files/65ea307d-82fc-4fc5-9203-4a00607b1380/xofafuvozalejunasetutow.pdf
    • https://uploads.strikinglycdn.com/files/b4d915e4-36f0-4067-8e52-7b7ce2735b0f/80506794955.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f71.bin
0707b87e53cb53ecb8ac45f10af42b15442ab72c397f12513321a6c3108e5cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 5708 bytes
font_01_sfnt_off000072bb.bin
60d1235b9bd36d9919c4e72b3b4163cb2f9417e79e8681c1762c3bdb7592cff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BB 10608 bytes

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