Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb02e5e15de940b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 15:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cba2d637e413ea7c018b29985cf5371 SHA-1: c3e1c9742084e25beeca3ad6d415d742171931dc SHA-256: adb02e5e15de940b3067dcbfcc30324f7e3254715fa35dfb1daee2bc7fba2022
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are part of a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL for the redirector and references a "proof of loss of coverage letter template", suggesting a social engineering lure to drive traffic to malicious infrastructure.

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=proof+of+loss+of+coverage+letter+template
    • http://files.evelyncanne.com/uploads/1/3/1/8/131856904/sipow_gurirebusonil_rimij_xakokozonifako.pdf
    • http://files.sometimesbooks.com/uploads/1/3/0/7/130738993/padalaluzeduvif.pdf
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/fobaxusupuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/47392750891.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/lisupek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/27288507497.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/dedezozigovijolijudijelak.pdf
    • https://cdn.shopify.com/s/files/1/0447/2533/8265/files/all_formulas_of_maths_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/3979301004.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/41957111923.pdf
    • https://cdn.shopify.com/s/files/1/0449/8548/3422/files/39783226075.pdf
    • https://cdn.shopify.com/s/files/1/0435/0754/8326/files/how_to_install_gtx_1060.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/57105432122.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4527/files/rotagibagimunefabadoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/clinical_chemistry_bishop_5th_edition.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_off000065da.bin
a867cf28cc66c73162e57026d4f478b2f84ff28f891d863a70d38fda639d3e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 5396 bytes
font_01_sfnt_off00007826.bin
33520c0af1612773ee5284b017a2bfa956f0e45746ace02f9c257f86d5a22dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7826 9900 bytes

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