Malicious PDF — malware analysis report

Static analysis result for SHA-256 2572917653cde6b1…

MALICIOUS

PDF

37.9 KB Created: 2020-08-30 22:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5128e1f5b407c76b5607d1d016ca2bf SHA-1: be852f971c0680edc235d4ab5bd3801976143f9a SHA-256: 2572917653cde6b1dfdf57ebfdf043c53db603231f7456da450ec764e3fdd0ba
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many pointing to what appears to be a link farm hosted on Shopify, with one primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting a social engineering tactic to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.cc/wix?keyword=carlos+zarzar+charur+la+didactica+gr
    • https://static.usrfiles.com/ugd/b8c837_db409db4f6a241769f915350bc4ae4e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7254b13464f7453bb03adde8555a7a0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2144100e9be34a09ba9a82ea531e3fca.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/23350845215.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/among_us_pc_atualizado_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/4474536157.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/supaboxopiben.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/17909643173.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/vixumometawurumifijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0540/files/the_economist_2_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/41408716201.pdf
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/ccps_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/83214282930.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_off00005864.bin
0989f6723c44d8537442d2dcc355d41966dc9cebf6255420400cb0a9474d3bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5864 5156 bytes
font_01_sfnt_off000069e7.bin
fe21f44d0fefb5dbf83757206faeec5eb33c89d7584b7eaa1265ee56525af9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 9676 bytes

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