Malicious PDF — malware analysis report

Static analysis result for SHA-256 97594d4d017eb930…

MALICIOUS

PDF

60.4 KB Created: 2020-08-30 07:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1fd8811346ea3e0750ad69c39be066 SHA-1: 1d31654bc719a3f3f0239aa1a2ce4cd9357c867d SHA-256: 97594d4d017eb9302ea9c3d5706d9701259200453f4d75ae59d536d3c77b7515
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 'https://ttraff.link/wix?keyword=fender+excelsior+schematic'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to shopify.com domains, suggesting a broad distribution effort. The ML classifier strongly indicates maliciousness. The document body contains text related to 'Fender excelsior schematic' and the authoring application, likely serving as a lure to encourage clicks on the malicious link.

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.link/wix?keyword=fender+excelsior+schematic
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/riddlers_riddles_arkham_knight.pdf
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/fadefujuxunupufalom.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/rowaxedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/what_does_a_chinese_keyboard_look_like.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7121/files/17269777854.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/translation_reflection_rotation_dilation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/dusaxipotofod.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/car_bill_of_sale_colorado.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/puxalesazesizidoxowu.pdf
    • https://static.usrfiles.com/ugd/8cbfce_329110130273432a89c632759639a2c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9dd1f4941204249bc8796e2d77bc6a5.pdf
    • https://cdn.shopify.com/s/files/1/0431/5044/2660/files/calcium_carbonate_omya.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/xanadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0858/1019/files/35712691105.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2415/files/fopemonog.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_off0000aedf.bin
376eb268cd6208e5433ed322da4e06e62f5bb69632ef2b0d702956d8c934beec
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDF 5200 bytes
font_01_sfnt_off0000c060.bin
e6bddd387e9d6e7a4d2c5886afc58cd937dfe1676255418bd9021342170e6d9d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC060 10512 bytes