Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab977e448fb2b2d4…

MALICIOUS

PDF

36.8 KB Created: 2020-08-31 12:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb65404bfe731dd56b758e112d921ed2 SHA-1: 1918f0112529fc362509b5fcd13e1bd56b8fa0fb SHA-256: ab977e448fb2b2d48eaa883fa205861b92361694983424ddc81be5b0c36850e0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=john+deere+z425+service+manual, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'john deere z425 service manual', suggesting a lure to trick users into clicking the malicious link. The ML classifier also flagged this PDF with high confidence.

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=john+deere+z425+service+manual
    • https://static.usrfiles.com/ugd/99965f_12b32b62fec144368b5daf9ccb545d32.pdf
    • https://static.usrfiles.com/ugd/238140_4fb394c47669441f9c059534ff26604d.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_aded177bfe19454982e5fe430265e4d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_02aa42f81d644e0993de17950c2cb1a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a88509c058504f01b420aa9940b59a71.pdf
    • https://cdn.shopify.com/s/files/1/0434/3457/3991/files/ulc_browser_free_download.pdf
    • https://static.usrfiles.com/ugd/d5d855_b6abcdd570214d2c8991b4e17a03837e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd080db55ec54f028f44cb67d5a5092d.pdf
    • https://static.usrfiles.com/ugd/2e79a6_52da4a703980417e8cc3348bc7785deb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cb4107600054da8b5f169b8a7abdea4.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d49e5c5caf9482085299ed73482cb7e.pdf
    • https://static.usrfiles.com/ugd/7ff653_f8ee0a1be13b4c22a8f25026ccfb57dc.pdf
    • https://static.usrfiles.com/ugd/52b593_aa1612d05fac4c32abcd100455dd1fe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_faef296725b646e9883756a4ebd6396b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e2332e9d968435c90a88c7900c7f6ca.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_off0000509f.bin
ab04b5c232020dde487c7b883e9a9f53b4d8108f7f003bc180949962d15c8fa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x509F 5620 bytes
font_01_sfnt_off000063a4.bin
63075f3b3f959ab1c66179de3ad2e9e3ba9d5121526283609473b4c09530be95
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A4 10152 bytes