Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fbc08b972ec5f0…

MALICIOUS

PDF

102.9 KB Created: 2020-08-04 15:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8d2bc030069e71bc5d2eef5209f9700 SHA-1: c68de85461e20456b4f1109eb25c57aadf532189 SHA-256: 27fbc08b972ec5f0281411c7993ec7c3929d21560fdbbba97d5bb0e5e735f0c0
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier also strongly indicated maliciousness. The PDF is likely a social engineering lure to drive traffic to the redirector.

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/pify?keyword=pdf+import+for+apache+openoffice+4.+1+3
    • http://files.derekrecks.com/uploads/1/3/0/8/130814070/mokesowowap-jovinejitibifad-xirovidanologo.pdf
    • http://riruserug.advbrand.com/uploads/1/3/1/8/131856372/javixepojalem.pdf
    • http://files.apollokc.org.uk/uploads/1/3/2/6/132681579/xawejesidudaxev-jisilo-pibajagur-lekavakiva.pdf
    • http://files.jimbosphotobooth.com/uploads/1/3/1/3/131378838/fikejopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/kefit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1196/files/81275099158.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/cardioversion_y_desfibrilacion.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/pegored.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/68416099459.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/vemexukilarakorukix.pdf
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/estrategias_de_afrontamiento_familiar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/66641800389.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7565/files/129567043.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/843304695.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/honda_civic_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/79163943095.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/neumonia_tratamiento.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_off00011dbb.bin
97894da5c71c8ea9bcf825500c60334d6c7598cff2715ae0d7d38cb3b47f015c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBB 13100 bytes
font_01_sfnt_off000148c1.bin
a32dac16e2bb20593666bb56172cb139bf6828047b8e66e01457262b1fd0135e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148C1 5524 bytes
font_02_sfnt_off00015b77.bin
f62c579957d47f694ffc031fa2486f72a021587e6d9066e8de83bac204fdd79c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B77 16284 bytes

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