Malicious PDF — malware analysis report

Static analysis result for SHA-256 df874b37322827c9…

MALICIOUS

PDF

48.8 KB Created: 2020-08-18 14:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 679a1bf82e1c05b6c93d8fd4d5697f10 SHA-1: 34c171fb17748a167d33e0e0c2ba634bddd6df43 SHA-256: df874b37322827c950fe3a6b27d0487245a667aa36180a4a1d7aa87c314486f3
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=new+graduate+nursing+cover+letter+template'. This URL is presented within the document body, suggesting a lure for users seeking job application templates. The PDF also contains a link farm heuristic, indicating a large number of external links, with 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdf' being the first identified. The presence of these links and the redirector strongly suggests a phishing or scam attempt.

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=new+graduate+nursing+cover+letter+template
    • http://files.socalfcboosters.org/uploads/1/3/1/8/131856904/jumupuk.pdf
    • http://files.rolandandco.com/uploads/1/3/1/3/131380870/bowatudupilej-kupas-ruzuwises-gifitinadelox.pdf
    • http://files.caprises.com/uploads/1/3/2/6/132681863/75fe5302e48ed0.pdf
    • http://guvarew.yogainhornsby.com/uploads/1/3/1/4/131483281/4269890.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/xakurobap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/wafejovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/cursive_writing_capital_and_small_letters.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/raci_matrix_xls_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/giniwetufabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/medical_certificate_for_casual_leave.pdf
    • https://cdn.shopify.com/s/files/1/0450/7402/2550/files/rajasthan_stenographer_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/list_of_surveying_instruments.pdf
    • https://cdn.shopify.com/s/files/1/0438/8916/4440/files/kuvujosezalekazaxilanu.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_off00007f97.bin
52cc4818492408237e1e9ecb6f0bf05a930d6ca3176188cea6e28de4b6bce48b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F97 5512 bytes
font_01_sfnt_off00009258.bin
cd0bf025e087a6e810a357b726b691de8d30cb4d21fe2b4d35c9fc7fa3a338ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9258 10460 bytes

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