Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2b5f18c145fb9d…

MALICIOUS

PDF

56.9 KB Created: 2020-08-31 16:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac15c4226ae6eccf8c6e6e3eb41a04f1 SHA-1: 2e54d09738d517773086fe1800d8d1d5ebe73157 SHA-256: 6e2b5f18c145fb9d53bc4bd1b031c0b5949f77c8cb05d0a71725a2e49ca03060
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.com/wix?keyword=lagu+adventure+of+a+lifetime+cover' is the primary IOC, likely serving as a gateway to further malicious activity.

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=lagu+adventure+of+a+lifetime+cover
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/99745514428.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/o_que_meio_ambiente.pdf
    • https://cdn.shopify.com/s/files/1/0459/1249/0133/files/60712330872.pdf
    • https://cdn.shopify.com/s/files/1/0438/1707/4850/files/15308982123.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/26636249476.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/89896461296.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/seruvolevewaw.pdf
    • https://cdn.shopify.com/s/files/1/0457/3973/7244/files/minecraft_free_thai.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/65384292859.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/life_and_death_twilight_reimagined_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/7135/7336/files/piwewevozire.pdf
    • https://static.usrfiles.com/ugd/b8c837_22b63078c113456380a9961e3a46eb28.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbc3ed3688bd4e81b20d5ed8562a561f.pdf
    • https://static.usrfiles.com/ugd/b8c837_71205bbc53eb4b099c60c9424b31e795.pdf
    • https://static.usrfiles.com/ugd/221f3a_08d3d91c75b04fffabe6bfa72a6eea69.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009607.bin
fa1450c4ea99b617d38fb02dbb22a315a09f9dba47b14d1320b5fc5b4673b067
pdf-font-stream PDF embedded font (sfnt) at offset 0x9607 5164 bytes
font_01_sfnt_off0000a794.bin
3565d22a656c4e8e8fe5b952ae7299c37d12d5411e555c14be378a3fadb625b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA794 15400 bytes