Malicious PDF — malware analysis report

Static analysis result for SHA-256 8435698e664a3ad8…

MALICIOUS

PDF

49.0 KB Created: 2020-08-06 16:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c22b6238ec919ba21a00e3503d5af20c SHA-1: 66044d331926b80edd92c3671958d6e5f86a4fec SHA-256: 8435698e664a3ad89442f9b1d26c3046e5d90f34f40b4337e89506956f3556fe
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates a malicious redirector link, and the ML classifier strongly supports maliciousness. The document body, though partially corrupted, contains the URL that triggers the malicious redirector, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=dictionnaire+technique+du+petrole+anglais+francais+pdf
    • http://files.schoolofstpeter.com/uploads/1/3/1/4/131406082/pabaju_zepobem.pdf
    • http://files.alexherrald.com/uploads/1/3/1/3/131381518/juvoxelazo-gadex-vilukiwe.pdf
    • http://files.flogrips.com/uploads/1/3/0/7/130775786/3435179.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/jagamakanulud.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/56117992671.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/25255400016.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/tosulofiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/66780303435.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/tokisebufafubevalenalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8954/files/kilemenurog.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/fatelutimadexuvofesotu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/72503445148.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/92300116349.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/multivariable_calculus_concepts_and_contexts.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/alimentos_con_alto_contenido_de_carbohidratos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/delubavab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df6.bin
12a0bfb1200b9aa31b29be246776753bcb930609a734e45f5eafb749cec24a67
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 4236 bytes
font_01_sfnt_off00007cef.bin
b68761c1d6912e8e05b63ff0a4ca145290c55671584c23edeb97324b6ec06709
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEF 5540 bytes
font_02_sfnt_off00008fbc.bin
ce045bca171548d19afb4f18226acda2ec567422e94d105f99bd3aeb411022ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBC 11440 bytes