Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5858314fd334bc…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 06:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af6f8f95d92b863056e306b8913decd8 SHA-1: 5131c563e1cd16fa5b1b6463b01ab47a4250f9c9 SHA-256: 4d5858314fd334bc6e39fd2e45fe727c7dba8d7065c99e32f0b9b84b45a2a016
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body text, though partially obfuscated, includes 'Bcbs appeal form 2019' and the malicious URL, suggesting a phishing lure. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF structure. No scripts were extracted from this sample.

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=bcbs+appeal+form+2019
    • http://files.rebelrustictexas.com/uploads/1/3/1/4/131438658/vipefupefugafuwo.pdf
    • http://nugiwuv.q8ti.net/uploads/1/3/0/8/130813059/9e4e842b4432aa.pdf
    • http://lupux.karyngearyphotography.com/uploads/1/3/2/7/132740892/vufosu-robipodiwiwamen.pdf
    • http://xugim.missiowaresourceportal.com/uploads/1/3/1/3/131378942/dde334e.pdf
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/4/131411474/2683738.pdf
    • https://cdn.shopify.com/s/files/1/0436/9013/1609/files/68936827526.pdf
    • https://cdn.shopify.com/s/files/1/0431/6967/7474/files/zikodedozopuzexudubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9996/files/zixidonik.pdf
    • https://cdn.shopify.com/s/files/1/0430/0898/3203/files/porutakedufulotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/57404269875.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/general_adaptation_syndrome_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/2004_chevy_impala_repair_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/97472511506.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_off0000561c.bin
8dc54c8e8dae174bf8ce73e0204d3a3f4eb48d9b80693948b1973a0395f016d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561C 5388 bytes
font_01_sfnt_off0000685a.bin
5db70949a037db6c3f616748f9d77788627d6ee34def5003a45b29a39a691128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 9980 bytes
font_02_sfnt_off00008a94.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A94 4324 bytes

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