Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00d0174a510bb07…

MALICIOUS

PDF

34.8 KB Created: 2020-09-04 07:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d6a8849fbb7d7b3ec174789d3f7cb80 SHA-1: 3e7851ff600b08c6fc469029972c9117c0fcbceb SHA-256: d00d0174a510bb0796caf01543cc5356f6f1ee9a5fab5d1fe075a97ed96bb34d
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector URL. The document body, though heavily obfuscated, contains the same title as the malicious redirector URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=babu+seya+waambie+video
    • https://cdn.shopify.com/s/files/1/0437/6723/4714/files/46714348623.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/rigobuwitakoguwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1496/2848/files/vehicle_inspection_reports_online.pdf
    • https://static.usrfiles.com/ugd/b8c837_36015bfecebd4de887802a544476f7cb.pdf
    • https://static.usrfiles.com/ugd/838e7e_13d4aa32afe2429495ab85d936229c44.pdf
    • https://static.usrfiles.com/ugd/dad90e_d5f0792afa324e03a1ae8d04268d75d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/739437_8a3f746437e74b12a34941ec14351799.pdf
    • https://cdn.shopify.com/s/files/1/0429/2132/8807/files/53699680404.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/biology_book_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/56712550274.pdf
    • https://cdn.shopify.com/s/files/1/0460/2694/8767/files/76551761204.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/vodonorozebagip.pdf
    • https://static.usrfiles.com/ugd/5de1df_422d1a6ec46c437ab55494f5dd970008.pdf
    • https://static.usrfiles.com/ugd/b8c837_49fc44077d1f4567aa6519290ec7698e.pdf
    • https://static.usrfiles.com/ugd/1cc777_c222de147b4645b5ba2c50f5d2fe9e14.pdf
    • https://static.usrfiles.com/ugd/041b56_39b94347d11349d4886683d82fbbf44c.pdf
    • https://static.usrfiles.com/ugd/f4de5e_d452c1ca7f57454da10fc252c9d378f6.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_off00004b7e.bin
c896a24c1447c587514e7e603c0048af52cbba95e6722c157562c60159cda3d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7E 5288 bytes
font_01_sfnt_off00005d85.bin
d500343644debfbeb30324182a7a84253ef6ddc842e870e49ac3b95f40b3643b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D85 9588 bytes