Malicious PDF — malware analysis report

Static analysis result for SHA-256 1604bdb3424d0d9b…

MALICIOUS

PDF

44.6 KB Created: 2020-09-13 15:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 495b3bdcf3194407df6b931fed71a71a SHA-1: b897338e726c4d28758ce03410922c1cf27625c1 SHA-256: 1604bdb3424d0d9bfe98df55cb5c1f328e3f6e90a5b5d3d3ca50abbf8d13b315
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for "Minecraft military base tutorial" content, which is then linked to a malicious URL. The presence of numerous other PDF links suggests a link farm or redirection scheme designed to obscure the final malicious destination.

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/wix?keyword=minecraft+military+base+tutorial
    • http://files.solerconsulting.com/uploads/1/3/2/6/132696015/xuxugiguvo.pdf
    • http://files.strandeddog.com/uploads/1/3/2/7/132740852/917f4ea86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/98821751458.pdf
    • https://cdn.shopify.com/s/files/1/0463/4014/5313/files/81732705689.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/sulezalajuwefawem.pdf
    • https://static.usrfiles.com/ugd/b8c837_8acb1d33c0c64a58a6a8bc1a74083211.pdf
    • https://static.usrfiles.com/ugd/cec570_446626bcde0047a8bc7c0198d818fbf2.pdf
    • https://static.usrfiles.com/ugd/2ca22b_1d0a944bdc984394bf722672c6ef47ea.pdf
    • https://static.usrfiles.com/ugd/f3bfbb_ae87b0b1e42844f2827178610b243f7f.pdf
    • https://static.usrfiles.com/ugd/99a8f2_3cd27377ff0f446f9d4156a31c6b4281.pdf
    • https://static.usrfiles.com/ugd/b8c837_5000b089e67f44d9981577ab7ba9da1f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006533.bin
6ace0901a423ac39703b58c30dfb36d1b6dc28991d010b9d3627669a8330b4f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 5156 bytes
font_01_sfnt_off000076a7.bin
7a54762e0ae75101e1c8c1572e2cecdf9b0c1f844d350042aa3006f5c28aa70b
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A7 9648 bytes
font_02_sfnt_off0000979e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x979E 4324 bytes