Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfd49b331eff2d8…

MALICIOUS

PDF

36.7 KB Created: 2020-08-21 10:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f9baad64d200c7c9c7684173e97eaaa SHA-1: f61ebc3484e13ebd551ec52032d679c2d6cf9fb5 SHA-256: fdfd49b331eff2d8596731b73f34bde1b21058530cbae462b8bf498452ac2552
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=diphthongs+ou+ow+oi+oy+worksheets, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to educational worksheets, likely as a lure to disguise the malicious intent. The primary goal is to redirect the user to malicious infrastructure.

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=diphthongs+ou+ow+oi+oy+worksheets
    • http://files.sallydearhealeyphd.com/uploads/1/3/0/7/130740231/ledekiso-zekukij-midimafop.pdf
    • http://files.debsartisanbakehouse.com/uploads/1/3/1/3/131379639/8070b7e2beffa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3763/files/book_folding_heart_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/21597341898.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/46828473260.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/71791445369.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/honda_gcv160_pressure_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78985131446.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/lowibopavam.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/titogitigutav.pdf
    • https://cdn.shopify.com/s/files/1/0462/8971/5361/files/fishing_report_john_day_river_oregon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5948/6626/files/gijobezosajut.pdf
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/tesis_de_caries_dental_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/jofamewokem.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/read_the_horse_and_his_boy.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_off00005247.bin
785c68abec6752e4847678b3364a0e18e913e91af5874222dcb767638a67ab07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5247 5096 bytes
font_01_sfnt_off000063ba.bin
f7836a2ce85e4b8eee20af191520efaddd54abcb67866f855fa7f3505f754bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 9948 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.