Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3fefb373796234…

MALICIOUS

PDF

45.8 KB Created: 2020-08-30 23:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76b83a270e852929ef76d7e3ef2e7e11 SHA-1: 1f5108102fcdf46e42e4ba2d8743d6832d959300 SHA-256: 0f3fefb373796234995317e8610915d30dbe5a7ad85b9e4da75754114389cc12
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, suggesting an attempt to drive traffic to external resources. The presence of a 'download button' heuristic further supports the conclusion that the document is designed to entice users to click on links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ron+legrand+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e4a001_6b87381cf637422db22f89b2ab577162.pdf
    • https://static.usrfiles.com/ugd/d01287_6672e87b41e1440494bbebd3ec8f5095.pdf
    • https://static.usrfiles.com/ugd/ee6770_c1d91a672ba64a27a4327dd146858159.pdf
    • https://static.usrfiles.com/ugd/576447_5d89c3529ab345819ab874fe84184a51.pdf
    • https://static.usrfiles.com/ugd/9ea91e_5c20bbe6b47c497493d0b9ea51f1f799.pdf
    • https://static.usrfiles.com/ugd/5360f8_7ae2b62a3c664626a567f78c2dbba9d2.pdf
    • https://static.usrfiles.com/ugd/9c43ec_200dec2cf9ba424c96657e1b41c3d65f.pdf
    • https://static.usrfiles.com/ugd/af0aa9_b689a1b64d934ec5869953fb4ce4d767.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/bioaccumulation_of_xenobiotics.pdf
    • https://cdn.shopify.com/s/files/1/0439/3874/2430/files/backing_up_android_phone_to_computer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/51155220442.pdf
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/nifomuvapaladoruteset.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9837/files/96308396433.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/82495224122.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_off000073b4.bin
452a0a0d8ca8dfe4db3e66a4452e5f2ada6fbe9320e34c5438030ee72b1d94c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B4 5036 bytes
font_01_sfnt_off000084ed.bin
238592174a6aded2cbdc117a64a8afc7815444a7335ae8676e77e00c18472d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84ED 11192 bytes

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