Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba079ece8feac71b…

MALICIOUS

PDF

44.4 KB Created: 2020-08-05 11:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4f76e4e55304ccc19e27ef8e7941c73 SHA-1: 470836147e21a20506aaa7ab2d35865b473edf78 SHA-256: ba079ece8feac71b54a0d3925d0250c1da613aade9cc28278c3e0d2a84ce989f
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=cbse+sample+paper+2020+class+12+physics+pdf, which likely serves as a lure to a phishing or malware distribution site. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious redirector heuristic.

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=cbse+sample+paper+2020+class+12+physics+pdf
    • http://files.njwrclub.org/uploads/1/3/1/4/131437513/fa56b.pdf
    • http://files.sophiamulheran.com/uploads/1/3/0/8/130813526/1584386.pdf
    • http://files.camellahomescavite.com/uploads/1/3/2/6/132682974/fe61f9.pdf
    • http://files.cabezonmastiffs.net/uploads/1/3/1/6/131636612/xonujovuwojip_rarebifuro.pdf
    • http://files.nicolajanephotography.com/uploads/1/3/0/7/130740213/tukoxakavusogezijuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/82427173084.pdf
    • https://cdn.shopify.com/s/files/1/0437/0736/7592/files/12171476599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/20287196838.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/fijiri.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/architecture_design_in_software_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/vevorisabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7352/files/pajolutozazodixorozopaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/11266091840.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6791/files/20448640938.pdf
    • https://cdn.shopify.com/s/files/1/0440/0054/2878/files/7890979579.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/34997710205.pdf
    • https://cdn.shopify.com/s/files/1/0448/2279/0305/files/mig_welding_machine_specification.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_off00005fe8.bin
133a2cd40d680e652f41979af38b33a1c770af703c8dc0f400c54be8915b6191
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 5480 bytes
font_01_sfnt_off0000728e.bin
2106597a3d2f3aa33c29daa033dd1703184929c5698230d9d2aeb09603b9ecab
pdf-font-stream PDF embedded font (sfnt) at offset 0x728E 10388 bytes
font_02_sfnt_off000095eb.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x95EB 4324 bytes