Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3e1fa69d7186c5…

MALICIOUS

PDF

52.4 KB Created: 2020-08-09 02:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bdd3570ff0dbbc24b76b97df58fa10a SHA-1: 23ce43cb5b02197b53a3e2c9386d7b9653e3191a SHA-256: ff3e1fa69d7186c5cf5d991c5a3d1361bfc2785d6b4fb67b10a2a3cba27ebb9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, with one prominent link leading to a redirector service. This redirector is configured with a keyword suggesting a lure for exam preparation materials, likely to entice clicks. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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/pify?keyword=real+estate+license+exam+for+dummies+pdf
    • http://files.watersportsinkorea.com/uploads/1/3/0/7/130776420/4c679c3.pdf
    • http://files.ronkachelmeier.com/uploads/1/3/1/4/131437724/9296702.pdf
    • http://files.housefinchinvestors.com/uploads/1/3/1/4/131453527/sapaxozumugaxe-gabakepax-vejupi-wufid.pdf
    • http://fugomumu.chrystalhardt.com/uploads/1/3/1/1/131164250/fenetesixuzo_kavexozu_depevog.pdf
    • http://files.santafest.ca/uploads/1/3/0/8/130874380/61e5615.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/vilovipivusidozafopidano.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/aggregation_induced_emission_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/80020925827.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/52295685061.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48880371243.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/7784729090.pdf
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/access_control_list_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8248/files/adolix_split_merge_portable.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/polumiporanejamitamugi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/importance_of_hygiene_and_sanitation.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/rubikenejemijugulijelun.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/duluf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/k_project_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/spelling_rules_for_plurals.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000725a.bin
6b73578daef1490c1b2929d0444a811a164443739a69df5ca7509217de3ce98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 3212 bytes
font_01_sfnt_off00007dd8.bin
caf1dde161841ae2e10709d905fe4d8aa725a8008d1f905b6b6087606e14388a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 5256 bytes
font_02_sfnt_off00008fa0.bin
17994e1ca4232c37d9c23eabb6fd975471129b0a5fa38222752f195ac3cbc1fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA0 11028 bytes
font_03_sfnt_off0000b510.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB510 4324 bytes

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