Malicious PDF — malware analysis report

Static analysis result for SHA-256 4469bbd0e5558bb2…

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 04:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3a40102454bd5386d01fc831e01f6c0 SHA-1: d4e2da1cf15f7931ef98babe0b1b3b0ca96ee4d7 SHA-256: 4469bbd0e5558bb24a7e56c968320e1e2fb9b5c23468066bbcb9425607a165d1
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references to PDF files, suggesting a lure to download a malicious document. The ML classifier 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.cc/wix?keyword=kenneth+hagin+books+pdf+growing+up+s
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/rakonekuv.pdf
    • https://cdn.shopify.com/s/files/1/0462/0415/8105/files/flappy_bird_ipad_price.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/68168438170.pdf
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/52392532058.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/sewoliwebibasija.pdf
    • https://static.usrfiles.com/ugd/b8c837_62820aa7407f4a74aae379d055a23c7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbd07f14ab5f45fd859c2f79901bb49b.pdf
    • https://static.usrfiles.com/ugd/b8c837_778064ffdee04353abbbbfaab9dbc789.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2e4ea4c537e4aed807f9165405a8193.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/anabolismo_y_catabolismo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/43196002443.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/conversion_km_to_m_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/65146511472.pdf
    • https://static.usrfiles.com/ugd/b8c837_338ec52389554e22a26c0a95fb6e4160.pdf
    • https://static.usrfiles.com/ugd/b8c837_77151b43802844539594be89dd31bea9.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_off00005c23.bin
0343cdda068661c0b0319cbab41764ef9b1d9a5dd888a4ff9847f9448d63cf95
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 5536 bytes
font_01_sfnt_off00006efe.bin
9359084f61fd2e6f6db5ef1f354f25203724e18c4a5c0c526c6cc1fc6275ec80
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 10316 bytes