Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbb084bbfef8b33…

MALICIOUS

PDF

51.0 KB Created: 2020-08-10 12:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae41830443fd133027438714ffa0b2ca SHA-1: 3dce19dd64bf770a549cf96607f0f84e735409d4 SHA-256: ddbb084bbfef8b337ecbed78b98aa5562cca37e2bbf0b817c728847007501762
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=ejercicios+con+numeros+romanos+pdf', which is also flagged as malicious. The presence of numerous Shopify-hosted PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=ejercicios+con+numeros+romanos+pdf
    • http://files.ccfsealytestsite.com/uploads/1/3/1/6/131637168/xilek_dudovuwow_palifalatug.pdf
    • http://files.endoflifedoula.co/uploads/1/3/1/4/131452840/mumovik-puzolitirofex-kowokewelidi.pdf
    • http://files.darryljarvis.com/uploads/1/3/2/7/132740264/9102558.pdf
    • http://files.peggythomaswrites.com/uploads/1/3/1/4/131438313/xuzopatotobal.pdf
    • http://files.fastinfofinder.com/uploads/1/3/1/4/131454523/5831411.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/bowipudodabavelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1174/3639/files/viscous_fluid_flow_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1483/8679/files/bajawujavigigufile.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1894/files/aadhar_card_update_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/color_street_application_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/38519137810.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/city_of_eugene_athletics.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/49107376181.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/nawunotepixaniz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/lomumisimuzidelepalu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/juguzujuge.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/free_missouri_residential_lease_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/benugumadutapudubiduzo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693d.bin
52f674e806ef5fcaa98aa76550418c1ce36d90ec2659768bb903586a62b7075d
pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 5300 bytes
font_01_sfnt_off00007b34.bin
913ec012851f7d77e0a8317df57ab5a20784951d9f1fb9d7ca322c3a27e0b52f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 14516 bytes
font_02_sfnt_off0000a7df.bin
726e433c7bbdf2a5a395708565affa97fb04a35428008954b5256cf6adea57e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DF 16164 bytes