Malicious PDF — malware analysis report

Static analysis result for SHA-256 db173d8f65eefbe7…

MALICIOUS

PDF

45.7 KB Created: 2020-08-05 15:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba62b7ff5a2345f330a7e3a683699984 SHA-1: dd65532ff4f37218a8f869a4f95c167f980afacc SHA-256: db173d8f65eefbe7dd04626ba441e2fd5d0bf6edd931c9d3045eb5f5f040df60
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains URLs that are part of a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=curriculum+development+theories+pdf, which is likely used to redirect users to a malicious site. The presence of a large number of external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.cc/pify?keyword=curriculum+development+theories+pdf
    • http://zinik.coreywalkermaine.com/uploads/1/3/0/9/130968984/venodavikajajenawilu.pdf
    • http://files.stgilespres.org/uploads/1/3/1/6/131637211/wonekisilo-ziseviwugoxuf-vafomimowitig.pdf
    • http://files.wallartandpresents.co.uk/uploads/1/3/1/3/131379761/gedotubuvezu.pdf
    • http://files.honleysamba.com/uploads/1/3/0/8/130814575/xefujevisekado.pdf
    • http://roruvetev.familiesfightingaddiction.org/uploads/1/3/0/7/130740522/150085.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/zolumafenamiwegit.pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/56569581858.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/42854487380.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/lulodamirulonosagujabula.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/kavimidamixufixiwati.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/26338118245.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/pexigigipabuzomikide.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/41841231275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ralaguguzovepusumizus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/pinuvofobasunalu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/858594737.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/64034872689.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_off000075f3.bin
152291f81fedcfb466f44bee1eccda9cefb71cab92cb0d65d9d703e284468b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 5148 bytes
font_01_sfnt_off00008751.bin
c8b87f143c48cc040ca5de8832d5d8d6a2dd383569c3a85a9f081f3c2137c545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8751 10040 bytes

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