Malicious PDF — malware analysis report

Static analysis result for SHA-256 a675c98061ab899e…

MALICIOUS

PDF

46.8 KB Created: 2020-08-23 05:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95226e623a468244b98d19adf633262 SHA-1: c54fa30638fa514edc23ed57610bc43e6c6e36b4 SHA-256: a675c98061ab899ef9172ccfdc63efb876949aa64eb2083152a31706fe7f047f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One critical heuristic firing indicates a direct link to a known malicious redirector at "https://ttraff.ru/pify?keyword=jlab+jbuds+air+quick+start+guide". The document body, though heavily obfuscated, contains text that appears to be a "Jlab jbuds air quick start guide" lure, and the authoring application is wkhtmltopdf, often used to generate malicious PDFs. The combination of the redirector link and the link farm suggests an attempt to drive traffic to malicious infrastructure.

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=jlab+jbuds+air+quick+start+guide
    • http://files.kelseyblotter.com/uploads/1/3/1/4/131406149/mixusaruvod.pdf
    • http://tipom.hamiltonpotterytools.co.nz/uploads/1/3/0/8/130873851/6958390.pdf
    • http://ritixer.ravenstreasures.org/uploads/1/3/0/7/130775478/sosotabowaxegifago.pdf
    • http://nokebo.patrickcoll.com/uploads/1/3/1/8/131871597/mokevowojasigu_rebopemig_miwexal_vigana.pdf
    • http://files.isp700.com/uploads/1/3/1/4/131483108/nigavo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/65122882609.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/reported_crime_map_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2736/5031/files/natek.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/72214865676.pdf
    • https://cdn.shopify.com/s/files/1/0438/2267/8173/files/luwobapokejoriv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/woxetumikivakurazuwubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2703/7336/files/17307653847.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/kafufenafugate.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/pdf._js_viewer_hide_toolbar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/zurusajejiso.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/meluzekudevagafuxibasilo.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_off000075d4.bin
4aa8e7c728e841c2fdebbe1aab61186d7f135b06b6018b9eb43f57f9ae7a20af
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 5500 bytes
font_01_sfnt_off0000888a.bin
9c8772aaeb5581c836ad51462c01fbbbf05ab7aa63ce31bf9d185c8032ca20a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x888A 10936 bytes