Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0645fe48527cac…

MALICIOUS

PDF

57.5 KB Created: 2020-08-29 09:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d34ffecfde569ed1bf1330db36df455a SHA-1: b8c9504bac1488178d8ee67f672412f3d90deb87 SHA-256: 3a0645fe48527cac009572698df31d1e07d987b24bc5b33d18a93f4aa4518d20
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, appears to contain text related to sheet music and the malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates a phishing or malware delivery attempt.

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=bwv+998+guitar+sheet+music
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/social_psychology_david_myers_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/mechanics_of_materials_8th_edition_gere.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/peboridolebodijon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/31499857131.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25618010541.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e97ca742095433ca6b4e60f8d16cf3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d9b459787ec429eb78af5b7178c33a1.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/particular_after_effect_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/tifemubolomajabewowese.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/kotazijuzepubovi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4871/files/sixokujapimukesolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/the_austere_academy_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/46822747335.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000892c.bin
1be8849668c200920b1e035b1c96710cbb9ffdd02d25b0a2acb925d329ab160c
pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 5400 bytes
font_01_sfnt_off00009ba1.bin
09d444b38676815429f3362bdcd926646460f30b5652802c93f4a43d4cc16b06
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA1 15232 bytes
font_02_sfnt_off0000cb17.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB17 4324 bytes