Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6c56ee6dba32c5…

MALICIOUS

PDF

51.3 KB Created: 2020-08-19 05:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35e4375bd127789c8f672cebef69fd9f SHA-1: 7e9b1e0ac44180fc35fa72907f0d9b12cfbbb783 SHA-256: 2d6c56ee6dba32c56441feab1e73831c50cb21080487e1da44ac314f9289cad2
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'cottonseed oil cake project report' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=cottonseed+oil+cake+project+report
    • http://files.stbxat.com/uploads/1/3/1/6/131637043/ronixisufi-rezem.pdf
    • http://files.mthermonministries.org/uploads/1/3/2/6/132682168/0c07c.pdf
    • http://files.lovelydaypittsburgh.com/uploads/1/3/1/3/131380849/3c9682.pdf
    • http://tujaf.sharonhalfordskintherapy.com/uploads/1/3/1/3/131384714/foxotefe.pdf
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/tabatimomezukadefusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6921/7699/files/goxijifoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/the_unimaginable_mathematics_of_borges_library_of_babel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/89218253227.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/wanoritof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/dedamiluwigisewomakanu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/51164957324.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/country_dial_codes_list.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e6b.bin
2dca07c1667f59cb3f4904cfd6435a4f7df299944177379f09c69e5b7344357f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 5016 bytes
font_01_sfnt_off00006f87.bin
9c438560f1a6388fc31d5837493ceb3a84d3619e0b68689b0d36885c0811f395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F87 13588 bytes
font_02_sfnt_off00009ace.bin
cc86994599ca2b6bade3ef2a24080e5ca7d0105f80c2e61a4a6d43fb5994c661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACE 16684 bytes
font_03_sfnt_off0000b1ea.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EA 4324 bytes

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