Malicious PDF — malware analysis report

Static analysis result for SHA-256 328558de10b464be…

MALICIOUS

PDF

54.0 KB Created: 2020-08-30 05:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de3a394b9d908d468075d7eeca04ffdd SHA-1: 2940819904258f0ab0df332494a9a3eb7ed6bf3f SHA-256: 328558de10b464be4a1b059fcb20f0e67f1f65f088fe481484bb045d3ef8af64
162 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting it is a service manual, but it embeds a link to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be generated by wkhtmltopdf, a tool often used to create SEO spam PDFs. The primary malicious activity observed is the redirection to a malicious URL, likely intended to deliver a second-stage payload or phish for credentials.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/wix?keyword=whitfield+pellet+stove+service+manua
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/newobeninuvisalinix.pdf
    • https://cdn.shopify.com/s/files/1/0436/9586/6010/files/loser_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/industrial_production_of_amylase.pdf
    • https://static.usrfiles.com/ugd/e1c37d_3398dc37dce04c479494d5d83ed66923.pdf
    • https://static.usrfiles.com/ugd/b8c837_11e0f9032a244d7096a530e51bef1904.pdf
    • https://static.usrfiles.com/ugd/b8c837_f16d3cd835f8488aafe8e3267766a5b6.pdf
    • https://static.usrfiles.com/ugd/15ebe2_d3940d5c6b1a45de894619f52c096b56.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/physical_science_grade_12_study_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/2390/9532/files/jixomeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/wuzurodijonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/xulufeperivasega.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/employment_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/failed_to_create_direct3d_device.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/74246667702.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_off000093f2.bin
7fbcbf64f4d0cd30e960d37c130e945d473805765a04bd6304bf7b385a9f54d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x93F2 5468 bytes
font_01_sfnt_off0000a676.bin
3813ff005d08694602a953334f6766c64403a6c50c376c379de6594dd8e736a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA676 10780 bytes