Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d62f1012942d91a…

MALICIOUS

PDF

39.4 KB Created: 2020-07-12 17:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25f1e98286deffebc43a5e4788818a20 SHA-1: 9860e8db76d50d5562c2c28d2cc5f35349ad1061 SHA-256: 3d62f1012942d91af2bdc23dad1250b0c64fd89270f030b7697f6f650856eb17
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure users to malicious sites. The primary attack pattern involves redirecting users to potentially harmful content.

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/wb?keyword=social%20inequality%20hurst%20pdf
    • http://files.laurelschoolofdance.com/uploads/1/3/1/4/131483154/174860.pdf
    • http://files.pvtennisclub.com/uploads/1/3/2/7/132710689/nuvumidobune.pdf
    • http://files.thediscoverypoint.com/uploads/1/3/1/1/131163957/tovimasomarep_lozatunadajeju_rotonovedumabo_mumevodevofa.pdf
    • http://files.passionforthearts.org/uploads/1/3/2/6/132682119/koditawi.pdf
    • http://files.annabarnhart.com/uploads/1/3/2/6/132681660/e1e0567a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/zaripovujakowumofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botezosural.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/67003387446.pdf
    • https://wakinaga.files.wordpress.com/2020/07/tobuwodegiwabamiwuvup.pdf
    • https://posuwobi.files.wordpress.com/2020/07/58952437775.pdf
    • https://geluxomu.files.wordpress.com/2020/07/fedudimovagudutogaj.pdf
    • https://ligarupature.files.wordpress.com/2020/06/85151839124.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3294478915.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/wekazigebabesikexawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/kazororujavore.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.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_off00005cb7.bin
2594c6ee54d75640fb83584ffd8c15bb565bebf9d19a83fe991b0d7c602b0a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB7 5456 bytes
font_01_sfnt_off00006f2d.bin
a644f0f62c360ad1b3a0d49bca4dc00a59cbcd7baec8c395540cf3dec61a3899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2D 9772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.