Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc63280b4bffdbad…

MALICIOUS

PDF

58.5 KB Created: 2020-08-31 01:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b83e846d8d7afa8d697d77d803c075a2 SHA-1: 755223103a9318b022052a985966a0f027f19c4c SHA-256: dc63280b4bffdbade477d2348650db3094f758ecf223ca0b17cd015af6477b40
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/wix?keyword=the+chicago+manual+of+style+16th+edi', points to known malicious redirector infrastructure. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=the+chicago+manual+of+style+16th+edi
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/47001688155.pdf
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/raja_babu_bhojpuri_full_movie_filmywap.pdf
    • https://cdn.shopify.com/s/files/1/0461/8990/4021/files/fitifov.pdf
    • https://static.usrfiles.com/ugd/1decf9_99616d5a5b4b4b60b32dcb51eff52faf.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_ffe918a387d84dbbad40ec1bf03d1ee2.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_762c6b81fe55475e8c21079cfa06bbcd.pdf
    • https://static.usrfiles.com/ugd/724fb5_96f61a54b3234ac8a211edc6257c5003.pdf
    • https://static.usrfiles.com/ugd/4bb894_faeea817a6014a9e86750b696b7d6b0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d2de1530d9a40f7a8d9d9c9c6652491.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/26202160370.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/estimation_costing_and_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/umbrellas_of_cherbourg_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/agreement_on_trade_facilitation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.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_off0000a556.bin
8e47715ce7b20c5863a03c417939848bf15abff74b15ca8f4e6d887821bad91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA556 5596 bytes
font_01_sfnt_off0000b851.bin
4d9ea5d143a87e2dcadf34c9cdf4fc9c567b37b1cf237a6f7bf349db0cf61a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB851 10236 bytes

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