Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafe1782bcdae931…

MALICIOUS

PDF

40.8 KB Created: 2020-07-17 01:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be5bb76ac903d5628ab777daff88a013 SHA-1: ff2548c0c1a9f47bccd41958005c1448ea4906dd SHA-256: cafe1782bcdae9313eea6c9969b10d3f94fc5f28dc61edef1692f2b1a4aaa0e0
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, suggests a lure for a free PDF download. The primary malicious URL identified is ttraff.ru, which is used in conjunction with SEO link farming to distribute the malicious PDF.

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=astm+a325+pdf+free+download
    • http://files.masakoonodera.com/uploads/1/3/1/4/131406391/5538736.pdf
    • http://files.ideamonterreypark.com/uploads/1/3/0/9/130969851/de4de62.pdf
    • http://files.bowcreekkennels.com/uploads/1/3/1/3/131379477/bifilaxarug.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/49773157354.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/49345961319.pdf
    • https://nonuwivab179611077.files.wordpress.com/2020/06/nofonadinizired.pdf
    • https://butisukumig.files.wordpress.com/2020/06/97452622404.pdf
    • https://nutuwuja.files.wordpress.com/2020/07/tefatagi.pdf
    • https://wonudat.files.wordpress.com/2020/06/62226125732.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/jaxefobegafubisalanoruz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/lituberuselonexekana.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/34696263350.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/sifajimanutexizedilotox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/2124414349.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.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/
    • https://nutuwuja.files.wordpress.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000615b.bin
5cfd96fb9c0054cd483a9ae9bff6dbe1e2fa95230ee1728dc16270569823b744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 5428 bytes
font_01_sfnt_off000073c4.bin
b1e0c3fb372bc068c96162e5ceaf42e4a283a7a6e5ce233d99414a6185658663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C4 10004 bytes

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