Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde0743bf5b837a6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 20:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d249677f75da98645069e7097dbb40 SHA-1: 6ae165377e178b6d204818d4382d344eea0d8618 SHA-256: bde0743bf5b837a6649bb47ed86552f7d3c157d706de2a70c65f0025763c62b1
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, 'https://ttraff.ru/pify?keyword=arduino+kit+manual+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Arduino kit manual pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of a link farm and a malicious redirector strongly indicates a phishing or redirection attack.

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.ru/pify?keyword=arduino+kit+manual+pdf
    • http://pasovapo.nataliefernadez.com/uploads/1/3/0/9/130968984/8107485.pdf
    • http://files.savisconsulting.com/uploads/1/3/1/4/131409574/1505320.pdf
    • http://files.callaneventplanner.com/uploads/1/3/1/6/131606368/9e067bde.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/rokagulagexavuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5726/7359/files/49772272954.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/94588078846.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/system_analysis_and_design_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/regovagevaxoxikogiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/tesobogofabozovije.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/17404049339.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/98126341565.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/dozuzulirutavor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/lavewodifewowugovubojad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/wemovor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/95570141827.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_off00006a60.bin
f6a2638a12ac272f58f973ca409dafbb05246ca708e9700ff3dbad33c28019f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A60 5064 bytes
font_01_sfnt_off00007b84.bin
e8c1b5e33c79f94840cc5d81b482dd09bd2e61e4b42ea82c68d2386cdd8ef2cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B84 10232 bytes

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