Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baaade35ceda387…

MALICIOUS

PDF

65.1 KB Created: 2020-08-19 01:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 395cdea7254ecae3068ebbe19acbaea3 SHA-1: c2ea93168899d508f5ed5940527d41c06604c4a7 SHA-256: 1baaade35ceda387c9198d3953ed487b373d5aee57c72145a30aff026f93b7b2
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, suggesting a phishing or malware distribution attempt. The document body and embedded URLs point to a lure for a 'Calcutta university ba registration form', which is likely a pretext to encourage the user to download a password-protected archive. The presence of multiple PDF links, including one to a known malicious redirector, indicates a coordinated effort to distribute malicious content.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=calcutta+university+ba+registration+form
    • http://rariju.tedatkinson.com/uploads/1/3/2/6/132681670/merejiforiwujonefure.pdf
    • http://zewisurif.sabelrentals.com/uploads/1/3/0/7/130775169/vurusurulafafoza.pdf
    • http://xesuda.maryqueenofireland.com/uploads/1/3/2/8/132814930/wizizala_fopupobilirisi.pdf
    • http://files.comobnp.org/uploads/1/3/0/7/130738720/1283502.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/parallel_models_of_associative_memory.pdf
    • https://cdn.shopify.com/s/files/1/0453/1814/4155/files/vejiga_neurogenica_espastica.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/vezowevaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8964/files/sexumenadepomoxubekelonex.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/27534439121.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/download_logic_under_pressure.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/sinasonabufubujuruzemefis.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_off0000bd14.bin
d15610f740f5833fa05c2785d90baca4b60ae53972e3d00dc582f093458d841c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD14 5408 bytes
font_01_sfnt_off0000cf75.bin
e5e450c747b0a1bcaadd65698ca2d6ef061fb217d12d578d782f7e47f34e3c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF75 12732 bytes

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