Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5969909c16e6c70…

MALICIOUS

PDF

45.1 KB Created: 2020-09-02 11:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 242fc7cee6ebe0fd455bef4aa482f897 SHA-1: f03d1c6d9139cb04781f39f8c5a6deb4233cd177 SHA-256: b5969909c16e6c70b9f28abbd0492bec5892dcd9f1e90d870c820db90b92088f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, disguised with keywords related to free movies, suggesting a lure to entice clicks. The PDF also exhibits characteristics of an SEO link farm, with numerous links to external PDFs, further indicating a malicious intent to distribute or redirect users. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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=businessman+2+hd+movie+free
    • https://static.usrfiles.com/ugd/48d9a1_2404c8aaed6f440b97e099d42405aafd.pdf
    • https://static.usrfiles.com/ugd/b8c837_172d42e92ff247ad86fd322153d4e154.pdf
    • https://static.usrfiles.com/ugd/735424_67ab9c99c1a24291a768fe960e952075.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ee0e4978d2f4d1aa929704d3dc48fbb.pdf
    • https://static.usrfiles.com/ugd/3e5d97_f3e4abced95840a6b4d8ab6d4d2f87c0.pdf
    • https://static.usrfiles.com/ugd/40b9e6_05eadff5a2054548a7ceff7c0c09914f.pdf
    • https://static.usrfiles.com/ugd/03a576_4a499b34648747d39ef8923411fe72a1.pdf
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/lirazolukekolexosixu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/1001_albums_you_must_hear.pdf
    • https://cdn.shopify.com/s/files/1/0436/1158/6722/files/active_and_passive_voice_complete_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/dead_by_daylight_killer_guide_2018.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_off00005e1b.bin
3ce8689b98d08b0c51aac0faecfb9b6870d9a8887e1ba3f3f22c3881fc54837c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 5356 bytes
font_01_sfnt_off00007032.bin
bdabc39be7aa9e06ccad6991927d9033334824d622f030e86d8fac2e12322b98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7032 10016 bytes
font_02_sfnt_off00009284.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9284 16164 bytes