Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3fe6ae6aab6078…

MALICIOUS

PDF

52.9 KB Created: 2020-09-02 12:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1972816857c29bf4a2e2a1c815b3ede6 SHA-1: ccac576177cad07200c9bae4b8c76341cc6427a5 SHA-256: fd3fe6ae6aab607882c21d70f775abf42724f778512f042e1148a96f1f8ff734
152 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 'https://ttraff.com/wix?keyword=adventure+movies+2019'. Additionally, it features a PDF link farm heuristic, indicating a large number of embedded links, with the first pointing to 'https://cdn.shopify.com/s/files/1/0438/2051/5488/files/36471261917.pdf'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of these malicious links suggests a phishing or redirection attack.

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=adventure+movies+2019
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/36471261917.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/tenuberimitikorepofam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/29249854608.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/16796795579.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/82204566196.pdf
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/hypothyroidism_and_depression.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/tunakizob.pdf
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/mind_your_language_season_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/mazexo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/uc_browser_apk_mini.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/29369289001.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/930285087.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/o_level_biology_notes_uganda.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/smiter_build_d2.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/
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009276.bin
5b27333b4aae37ab64df004bff09eec5ea6b4f6fe7d6fd8de69e90c73ff40904
pdf-font-stream PDF embedded font (sfnt) at offset 0x9276 5260 bytes
font_01_sfnt_off0000a453.bin
7658cc594e5d511c09e9d2d599d6820b55b7f7eac419f44b07db292b8e8ee77f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA453 10088 bytes