Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8aaf304316d2e1d…

MALICIOUS

PDF

52.2 KB Created: 2020-08-08 20:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b81942acdec6e2f59a45f4c587d1879f SHA-1: d8c583cb19e0faff3f98c091449c7eebb47bafd7 SHA-256: f8aaf304316d2e1d42a45c70f69998ff3b6ca80380397b4fd3221fbf6e739a05
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL points to a known malicious redirector, suggesting an attempt to lure users to a harmful destination. The document body contains garbled text and embedded URLs, reinforcing the nature of the attack.

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/pify?keyword=brucellosis+in+sheep+and+goats+pdf
    • http://files.taichikungfuacademy.com/uploads/1/3/1/4/131413905/kabozupusamok-zomufatazikopu-wuwoxile-jozape.pdf
    • http://files.devoted-disciple.com/uploads/1/3/0/8/130874026/kexik-semed.pdf
    • http://files.emmakjebe.com/uploads/1/3/1/6/131606069/7821949.pdf
    • http://files.en.lflplatform.net/uploads/1/3/1/4/131409463/wizupofonaxa-nilipeboji.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/61269300993.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/jajisagimuwilakitadoruzim.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6615/files/achondroplasia_dwarfism.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/pibojifuwutonikenerirubof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/mamamikezanusesepix.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/mifikasulir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/nosadenibif.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/lesovezipuzafe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/pebasifozisamuzin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/aacsb_salary_survey_2020.pdf
    • https://cdn.shopify.com/s/files/1/0445/1673/7183/files/99430321759.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/lisodokukogunewipufugi.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_off000076b5.bin
d6495b891235ad41c5f92a4a71c093b148433119f306d3c1a2862105c86ce845
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B5 5468 bytes
font_01_sfnt_off0000894b.bin
d728569ea109c0bf49afa00f0fb7e005653f40d6ed29bff7255c7cabe96362c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 10740 bytes
font_02_sfnt_off0000ae3e.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3E 16204 bytes