Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ce2cb9f352bdaf…

MALICIOUS

PDF

112.8 KB Created: 2020-08-06 05:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: add1ba6069fdb03c5c9e1256c53e996f SHA-1: 1a61b79f96946ce27c386b383e16ea9544ad57c1 SHA-256: 23ce2cb9f352bdaf5590bc2d6ed04dd126f1a1be025e9a694d49bbcc4c6e56b7
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=narrow+and+broad+meaning+of+education+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary redirector is malicious. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL.

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=narrow+and+broad+meaning+of+education+pdf
    • http://files.cffu.org/uploads/1/3/2/6/132683111/bazakekukaxatiwi.pdf
    • http://files.eastmain-salonspa.com/uploads/1/3/0/7/130738765/pasudevizodop.pdf
    • http://pijes.titansinvite.com/uploads/1/3/2/7/132740405/lexifituviki.pdf
    • http://files.leggsandmorellc.com/uploads/1/3/2/6/132695200/joxamamalu.pdf
    • http://files.sweetpeasunshinestudios.com/uploads/1/3/1/3/131383323/xifaxeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/audiovisual_translation_taking_stock.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/52940068681.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1519/files/video_downloader_ultimate.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/rudira.pdf
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/86943559495.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/sinojofurerawazinemisove.pdf
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/1623742756.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/zaxuludoguvugufolekas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/notedomozoturilazatagof.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/14505547687.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8912/files/zuvejonefojoxajal.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/33141956548.pdf
    • https://cdn.shopify.com/s/files/1/0434/8782/1981/files/real_time_pcr_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6202/files/zipawijutotetozotekijati.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_off00017c4b.bin
0438c6a6cc55af73aa6a7b84266e37c793a199619b512b93ce1070075a1e15f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x17C4B 5468 bytes
font_01_sfnt_off00018ee7.bin
8d448d0297f4790a2e1d4d5bb9b8a3d870d8018c831244e6bb2a484100efd169
pdf-font-stream PDF embedded font (sfnt) at offset 0x18EE7 10664 bytes