Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3bbc0e2b1bbf4f…

MALICIOUS

PDF

35.1 KB Created: 2020-08-20 03:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b74bf1af3c409b7b1ec3c14df6a046a5 SHA-1: ac5ec59c3d41de574086204b0fb2d397d8d85506 SHA-256: bb3bbc0e2b1bbf4f5650bf2f97520d2dd4220ef7149e8badcc81b887625ad859
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate documents. One primary link, however, directs to a known malicious redirector at 'https://ttraff.com/pify?keyword=laboratory+apparatus+worksheet+pdf'. This indicates a phishing or malware distribution attempt disguised as a worksheet. No scripts were extracted, but the heuristic firings strongly suggest a malicious redirector and a link farm for SEO poisoning.

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=laboratory+apparatus+worksheet+pdf
    • http://files.zachroyer.com/uploads/1/3/0/7/130775974/2aab377de3c9f.pdf
    • http://baminogo.gearpornberlin.com/uploads/1/3/2/7/132710797/nekinona.pdf
    • http://files.starrystarryskies.com/uploads/1/3/2/7/132740623/09411a.pdf
    • http://files.believerschurchleander.com/uploads/1/3/1/1/131163859/6f51491c6d.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/legaxujutuzotenuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2149/files/bogumimovavozukizesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9518/files/tilizufirajefagejor.pdf
    • https://cdn.shopify.com/s/files/1/0450/0317/8148/files/bosch_car_service.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/54056196825.pdf
    • https://cdn.shopify.com/s/files/1/0432/0536/1821/files/bosofewemif.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/ds2_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/34436291804.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/36957006876.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/dofowipapebugo.pdf
    • https://cdn.shopify.com/s/files/1/0441/3066/4600/files/60467668726.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/bivogiporipufigazofekipiw.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_off00004be1.bin
af65ba21e1b9c9e061849910fd0c907173867dfa4d85f5d9d1a84d4df04fdf9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE1 5436 bytes
font_01_sfnt_off00005e69.bin
0d896aa6f00563339826ba9b6b4e2867e6610434cce0b80a16b225587414abe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 9660 bytes

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