Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd44381587ff564…

MALICIOUS

PDF

60.2 KB Created: 2020-09-02 05:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e961a37dc302f9cde53332a6733ca880 SHA-1: 4b423d3cffd918a22b4d22b025d1538ed5b12990 SHA-256: bdd44381587ff56475f3d8b562e56ec83fea5b433ab9d6ec59c74517df6db3b4
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/wix?keyword=amnesia+ps4+trophy+guide+and+roadmap', points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to obscure the final malicious destination and potentially engage in SEO poisoning or phishing.

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.com/wix?keyword=amnesia+ps4+trophy+guide+and+roadmap
    • https://static.usrfiles.com/ugd/74a852_846813c06b6a40dea8af3f099aa7ff56.pdf
    • https://static.usrfiles.com/ugd/cc03df_4c571c7cace1432e8e7dd013de8cf665.pdf
    • https://static.usrfiles.com/ugd/9ec29b_d0d19e4fdaa44f32b3c2683670a5f977.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/rmit_enrolment_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/16497219228.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/leybold_d16b_datasheet.pdf
    • https://static.usrfiles.com/ugd/fd7405_2b5d41cbb66f4305be895bf019e973bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f0478cb90445b1bd23fb2084d983f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b8f1a4400a3422b8909dc1a4f0ee5ce.pdf
    • https://static.usrfiles.com/ugd/c7a620_e959f81892b84da9a29cafc4c12ea108.pdf
    • https://static.usrfiles.com/ugd/b8c837_69b4177964f64c07989b861c1ddc685c.pdf
    • https://static.usrfiles.com/ugd/a44510_ce417e735d4844f4a4a8614e5a6844bd.pdf
    • https://static.usrfiles.com/ugd/9904c2_848990a9bad2403a8cf9c42fff3ea60b.pdf
    • https://static.usrfiles.com/ugd/b8c837_01dff94f677c43b0b26f763c251e3641.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_off0000ad2c.bin
c72d96d92a7d12b5db91eba7dcbafe6c74313b55565185a481c59fa9ef72c1ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2C 5520 bytes
font_01_sfnt_off0000bfd8.bin
f8ff7389672788c3a4937b781299aa251ab2cddb53f3ac050d68b30516a6689b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD8 10964 bytes