Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3eb0ca63bb2430…

MALICIOUS

PDF

117.7 KB Created: 2020-08-09 20:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa77db8b9de02e7bdfb8f2e13f2710e SHA-1: 6f9316bca1f26ef13182f1aa32be25113450b4e9 SHA-256: dd3eb0ca63bb24308be7eabe06d568d136bd9179417e3455cdeb643023c6b315
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a significant number of embedded links, including a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The primary attack pattern involves luring users to click on these links, which likely lead to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=sumerian+gods+pdf
    • http://files.dancetolifestudio.com/uploads/1/3/1/3/131398174/fawok-mozusovov-zizuna.pdf
    • http://files.aarstudiomasters.com/uploads/1/3/1/4/131483019/c9e12.pdf
    • http://files.feministcounselloredmonton.com/uploads/1/3/2/3/132302982/7214791.pdf
    • http://files.placeoflight.net/uploads/1/3/0/7/130775085/76297cb5ee6f6.pdf
    • https://cdn.shopify.com/s/files/1/0434/1602/7303/files/bhagavad_gita_summary_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0189/files/tugiziwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/88162646073.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/21385990459.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/godugi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/dutafimefemusof.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/pisivuxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/wilatafomewuzibegawoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/python_read_serial_port.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/10415092106.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_off000183c3.bin
45a82c26ba260b5553019d09a8b3d9e71dc61fed23f94b35ad265e1051a8c398
pdf-font-stream PDF embedded font (sfnt) at offset 0x183C3 5432 bytes
font_01_sfnt_off00019622.bin
dc9141e052be93cf3532fbc14cc60a3959e25d6f43ee45b5810c541ab1474387
pdf-font-stream PDF embedded font (sfnt) at offset 0x19622 17108 bytes