Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe405f7abd503da…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 20:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba78ed018f4ef496786d6b9e526ece44 SHA-1: 90d3455c5ce8d5733eb086d54c5636c05c4ee3e1 SHA-256: fbe405f7abd503da995cc301cf33afae2191eecbda97d31ab66ae04e0b1d1750
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=html+css+link+stylesheet'. This suggests the document's primary purpose is to lure users into clicking malicious links, likely leading to further compromise.

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=html+css+link+stylesheet
    • http://runinid.steamychef.com/uploads/1/3/1/1/131164250/3695888.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/azazel_guide_tekken.pdf
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/injury_report_nfl_week_1_2018.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/36120275248.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/xeviguwazawaxadudefudiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/12081541687.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/94396633666.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/edexcel_a_level_business_calculation_practice_sheets.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_off00006579.bin
cfa6dd477414b25091e30bd8c4520fcb30a291da07d804374b97883c04b1d0a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 4860 bytes
font_01_sfnt_off000075dc.bin
046ff7c2e94b39f2ac6d604ec2c42e052e1bd70e5ae3294d2659c874dbeac583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DC 13620 bytes

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