Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc785776b1063179…

MALICIOUS

PDF

46.8 KB Created: 2020-08-05 11:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adad3503f879ac082ac479e713e922e9 SHA-1: b976d14f8fa6f80d8e1fa5321862e5a707b4e962 SHA-256: dc785776b1063179e32e77299f5c069f37a6b87e7986046e144b46e570fdcc5a
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a critical heuristic identifying it as a redirector link. It contains a mass external PDF link farm, with the primary malicious URL being https://ttraff.com/pify?keyword=metallica+enter+sandman+tab+pdf. This suggests the document's purpose is to lure users into clicking malicious links, likely for phishing or to download further malware. No scripts were extracted, and the document body was heavily obfuscated.

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.com/pify?keyword=metallica+enter+sandman+tab+pdf
    • http://files.manningartclass.com/uploads/1/3/0/7/130775518/3417994.pdf
    • http://files.thegoldminecircuit.com/uploads/1/3/2/3/132303378/e649b03db9.pdf
    • http://files.briantobinyoga.com/uploads/1/3/1/3/131397946/kazujovujewufakuta.pdf
    • http://files.flagstaffsings.org/uploads/1/3/2/6/132696063/funugav.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/nugozosajarutesoteb.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0604/files/73266044955.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/bioethics_an_anthology_3rd_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/bolikumenuvabekeba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/50887075735.pdf
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/gorejen.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/24567349124.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/business_plan_format_template.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_off00006bba.bin
3e4df857ec25af398939d849539b240f34b0aa0d55f18ae5f589b5b5e0fb042d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBA 5448 bytes
font_01_sfnt_off00007e30.bin
1915587be40a850566611b8c581671163f36470bd2aa59e80d2807c66f14b7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E30 15088 bytes

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