Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ab63f173a88871…

MALICIOUS

PDF

45.2 KB Created: 2020-09-06 20:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea31134b92f00519a94c26afc61dfd97 SHA-1: 39309e27e599cd7e20d683a5e373aca04123209f SHA-256: d1ab63f173a888711639c29193ee064157c28937485c5118afe79ab8c6f5766e
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.me'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify domains, likely for SEO poisoning. The ML classifier also strongly indicated maliciousness. The document body contains the malicious URL, reinforcing the lure.

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/pify?keyword=android+emulator+to+access+localhost
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/71293218636.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/lerugugibipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3396/files/xafekagobakefubomura.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/17782295609.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/98075046758.pdf
    • https://static.usrfiles.com/ugd/b91566_0d00ebf1e6d14e3b89856b511a225b96.pdf
    • https://static.usrfiles.com/ugd/b98abb_d6b34faec5b54be68b522887f87bacfb.pdf
    • https://static.usrfiles.com/ugd/90d19e_2db70e939f6d40f4b1ea95cd408cbe1f.pdf
    • https://static.usrfiles.com/ugd/bcfc12_73339f203e334c24948b2303f0c62bd0.pdf
    • https://cdn.shopify.com/s/files/1/0437/6851/2669/files/android_studio_3._2._1_logcat_missing.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/49113279230.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/spelling_activities_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/57953852996.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/background_color_clear_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/dell_u2412m_user_guide.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_off000071b5.bin
087cc2bdbbba569e0218a2d21799d6d4bc70b66f2a5ed5bf0fba9f1c345d6475
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 5168 bytes
font_01_sfnt_off00008314.bin
4aecb347e22e4e50200fdfe615944a4a97afae23c713de1e167c17f01f86e1aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8314 10652 bytes