Malicious PDF — malware analysis report

Static analysis result for SHA-256 325df2b5d41658bd…

MALICIOUS

PDF

34.0 KB Created: 2020-08-16 12:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efb6e5cb2aa4753bcef50432e10ad9d5 SHA-1: a72891f08cced4a77e55830200c8c6c9d621637c SHA-256: 325df2b5d41658bd297463fd682a08f604b6551b4b0250387d4c617b8cba868f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as an educational worksheet. The document body and embedded URLs suggest a link farm strategy, likely to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=brain+teaser+worksheet+for+grade+3
    • http://files.henriettaallsports.com/uploads/1/3/0/8/130873851/mugub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5645/5067/files/fewedabexevazasifes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/bulewabakaxufufolasis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/juzululepilikebovam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/78218719087.pdf
    • https://cdn.shopify.com/s/files/1/0433/7637/8014/files/957471288.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/icao_annex_11.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/vce_to_converter_app_v3._6._3.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_off0000462a.bin
ffd1dfd61ebdd100f6df294790550b8d00da64f84c0bb7adbc7fca11edec6178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x462A 5508 bytes
font_01_sfnt_off000058f3.bin
b9a1073537b9ff2228b0d8c80dd89b442232e513d643618c89263da16ef1b0f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F3 10148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.