Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b5f6d1d52ac2db…

MALICIOUS

PDF

47.1 KB Created: 2020-09-17 11:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f275d7591f91cb3b26c3aaa08b015f6f SHA-1: f3d3dc742af3a4cec9735c0e924d3f27aeed84c8 SHA-256: 22b5f6d1d52ac2db465732839749a47c331356bb0b307b0f9fdd9c6bddabe2d2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at ttraff.club. The document body, though heavily obfuscated, contains the URL that leads to this malicious redirector, disguised as a study guide. This suggests a phishing or social engineering attack aimed at directing users to malicious infrastructure.

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.club/wix?keyword=wiley+study+guide+for+2019+level+i+cfa+exam
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/76163813652.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/lisp_file_autocad.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/what_is_the_frequency_of_light_s-1_that_has_a_wavelength_of_3.86_10-5_cm.pdf
    • https://cdn.shopify.com/s/files/1/0482/6021/9042/files/usb_2._0_vga_adapter_driver.pdf
    • https://cdn.shopify.com/s/files/1/0435/3379/5477/files/neoplasia_endocrina_multiple_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/discrete_event_system_simulation_5th_edition.pdf
    • https://b46a8587-d84c-4f12-a12d-dd98ba4685f6.filesusr.com/ugd/3e87bf_c12bad6836184605ba6cc2f1a28849f5.pdf?index=true
    • https://bd7294e4-bea2-4f2d-ac36-7c02b271b8d8.filesusr.com/ugd/9c66ff_b7eb790725aa437eb6ebdfea27c80cd6.pdf?index=true
    • https://d1c876e2-34f1-4c12-aeba-174b422a93a5.filesusr.com/ugd/10b03a_584102456f81480f91a64b24ef860852.pdf?index=true
    • https://b503b7d2-8d61-4817-a60b-18cfe588ea66.filesusr.com/ugd/4d400c_0a99656c2e8d498fa4c7af4fe616844e.pdf?index=true
    • https://eb6fdbb3-313a-4bf4-bdce-1d0e7c689331.filesusr.com/ugd/a9248e_f605d528ffa445cca99512331acdbf14.pdf?index=true
    • https://ef1780f4-638a-423b-8455-a2a92fc2a24b.filesusr.com/ugd/c33f71_1a4da1c4b4764fc4b1f8638f4a92443c.pdf?index=true
    • https://5e73896c-fddb-4e11-bd40-0137d1fe8db4.filesusr.com/ugd/3cb679_63bc1ce7bba043beb652aaa86a6ff3e1.pdf?index=true
    • 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_off00007592.bin
db3713c227a887c5aa311bcf9472bedd47142f01137794fecf751e63f736d2fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 6068 bytes
font_01_sfnt_off00008a46.bin
aa76efddacfd198b74ad42d1f695e7dec82a4959172752c1b6f5e73f3a2866a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A46 11072 bytes

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