Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0ba928e705050c…

MALICIOUS

PDF

44.3 KB Created: 2020-07-30 18:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeeb0e662b76a95e49fefd1dd7dfa1fc SHA-1: 2636db660e17f7836319c40927a7af42bf1c9255 SHA-256: df0ba928e705050c0c03447ede17da907c7a5811c00247d3df12cb05f912f5ca
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a farm of other PDF files, likely for SEO poisoning or to obscure the final malicious destination. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains references to 'Oblivion game guide pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to a fake guide.

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=oblivion+game+guide+pdf
    • http://files.spearmintcleaning.com/uploads/1/3/2/6/132681293/manawisereke.pdf
    • http://files.haematology.com.au/uploads/1/3/1/4/131453241/0e7059.pdf
    • http://files.eleanorpersonaltraining.com/uploads/1/3/0/7/130776409/1907390.pdf
    • https://cdn.shopify.com/s/files/1/0431/9707/1524/files/zopadiseratagagenokojixej.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/mokipiponikegovana.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/29906856562.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/wokunuriru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/panij.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/lewusozijuvilolip.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/ramezoxofex.pdf
    • https://cdn.shopify.com/s/files/1/0437/9777/4497/files/16015280488.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/jalixodubigarigoroxaramem.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2813/files/53773753875.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/
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070dd.bin
2b844a6e106e0fb404f31e769a5056faf3ed8aca73b6a0459b11875865b0709c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DD 5116 bytes
font_01_sfnt_off0000822b.bin
00d269d09bbaaf062d7bdb173f0d08f74f28aeff4d119b5ca03cf9af71864447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822B 10032 bytes

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