Malicious PDF — malware analysis report

Static analysis result for SHA-256 df26ee3c35ac4191…

MALICIOUS

PDF

50.8 KB Created: 2020-08-31 16:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ed8fe3408d4c508f7aee8a9f9d7a590 SHA-1: 828ad6fdbaa4d7c3c4ccb8e2cc4dd749c375eaea SHA-256: df26ee3c35ac41917479712051adfb0f09db02ff147bba4315a23847c0273b3a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on static.usrfiles.com. One of the embedded links, https://ttraff.cc/pify?keyword=balanitis+en+perros+pdf, is identified as a malicious redirector. The document's content appears to be a lure, possibly related to search engine optimization or content farming, designed to drive traffic to malicious infrastructure.

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.cc/pify?keyword=balanitis+en+perros+pdf
    • https://static.usrfiles.com/ugd/6924eb_77d23669e3b64ecbb24a8b5885f311cb.pdf
    • https://static.usrfiles.com/ugd/cc15ef_0ec4cecf28e04fa8bd89d6b4255706b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb835e4e5b2b4850a9dce70c08322263.pdf
    • https://static.usrfiles.com/ugd/f3cb45_826bdd6b9aad4ed88e3460ec748a70f0.pdf
    • https://static.usrfiles.com/ugd/6f9b04_77c594c7c294442d8a4a79ac82c84f44.pdf
    • https://static.usrfiles.com/ugd/289c5e_b2eed3b21c984c35913f5583ab63e6d6.pdf
    • https://static.usrfiles.com/ugd/a58b01_ce140fc51b5c4f43afa7efead1106fa2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8bb8863f49b47658de09ba7c8d2a5b0.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_4d975554c201403bb6e907d2c5086138.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/geometry_textbook_answers_chapter_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/etica_a_nicomaco_aristoteles_os_pensadores.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_06893a3f22a1475a9c41536ad48bafae.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d25e2f40bc0452ba08d636201fd97ac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c3f.bin
359a19dea593f83201c05eb7322edd0fda8c733f45d2f0d32ae512cbd3023c02
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3F 4872 bytes
font_01_sfnt_off00008ccd.bin
d488e97700a055da5366dab24748a8a79d2cd3f45828f7122903eacb3f781865
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCD 10496 bytes
font_02_sfnt_off0000b0b4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B4 4324 bytes