Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca2b792da680187…

MALICIOUS

PDF

50.0 KB Created: 2020-09-07 13:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f4fb8495aa052feb290358069361955 SHA-1: 995b19372f6067eb5a244f93c7f613acdc3c9344 SHA-256: 4ca2b792da68018795ccd4a6bdd820453f156664e2a01f4db358f96c5a20a93f
152 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=waning+moon+guided+meditation'. This URL is likely part of a phishing or malware distribution scheme. The document also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector and the link farm structure strongly suggest a malicious intent to lure users to a harmful site.

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=waning+moon+guided+meditation
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/html_css_javascript_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/27129333866.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/2012_audi_a8_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/reducing_fractions_worksheet_answer_key.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddc0630f1c2343548252af4e0678ed85.pdf
    • https://static.usrfiles.com/ugd/275374_a4c33b915f7e4cd89a3879a01dd8b32c.pdf
    • https://static.usrfiles.com/ugd/d13e1f_d7033832b1884ed3b2644db247720307.pdf
    • https://static.usrfiles.com/ugd/d48fe3_62f688217c324ece839d18930895e880.pdf
    • https://static.usrfiles.com/ugd/d1d005_03a52e60b5644c9aae05a5810bcaa483.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7470/files/91657486709.pdf
    • https://cdn.shopify.com/s/files/1/0459/1756/9173/files/torodagexisovojopa.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_off0000878f.bin
49e738d2fa0e38b5764f953c6d2d1c9390646b22776736b03b75fa3d2314f07b
pdf-font-stream PDF embedded font (sfnt) at offset 0x878F 4852 bytes
font_01_sfnt_off0000980f.bin
35faf78d80702e087cc949cce65a83109d0a31946d0a63e8a76f9c8e4293aa97
pdf-font-stream PDF embedded font (sfnt) at offset 0x980F 10420 bytes