Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdc88de35dfbfaf…

MALICIOUS

PDF

45.1 KB Created: 2020-08-12 01:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 560f240fa4e1d4b221d12c315b885696 SHA-1: c1e26ccb64a3c6e31635e28ce08ea27ab067873f SHA-256: 9cdc88de35dfbfaf272f964ef2c702ddd1bee84b8289302d6874d19719217123
120 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 pointing to domains associated with link farms and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary lure appears to be an 'application letter sample for scholarship pdf', directing users to a malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains this lure text and several other URLs, some of which are confirmed benign but many are unknown, suggesting a broad distribution effort. The file's purpose is to redirect users to potentially malicious content through a chain of links.

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.com/pify?keyword=application+letter+sample+for+scholarship+pdf
    • http://jepobe.thewarriorsoftruth.com/uploads/1/3/0/7/130776485/2801326.pdf
    • http://files.jjeffreymesserole.com/uploads/1/3/1/3/131384018/f3faf9c41e.pdf
    • http://tinumirel.arielmakesmedia.com/uploads/1/3/2/8/132814930/wajerekamam-fibolo-rogani-dumuwuxew.pdf
    • http://files.thesweetfarm.com/uploads/1/3/1/3/131380063/2787147.pdf
    • http://files.sass-and-crafts.com/uploads/1/3/0/8/130815213/puwakujojavulazamad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/circuit_analysis_problems_and_solutions_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/85460218884.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/castellated_beam_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/vixupokusur.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/ccna_cyber_ops_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/82405855295.pdf
    • https://cdn.shopify.com/s/files/1/0438/3070/6333/files/dufitezido.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/20809009005.pdf
    • https://cdn.shopify.com/s/files/1/0438/2549/6221/files/gelarofinufad.pdf
    • https://cdn.shopify.com/s/files/1/0448/6030/9665/files/bsa_baloo_training_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/25886280147.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_off00006ff3.bin
03d7e03c3f4761a2015154744cb36aeb17276765c182f194fc102a7b1f7fa7be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF3 5384 bytes
font_01_sfnt_off00008206.bin
d71fd8259e4d33457bd422cde9e94324c5b72327f9cd7b0e043fd2fd567d3b6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 10800 bytes