Malicious PDF — malware analysis report

Static analysis result for SHA-256 c829922df5da4f17…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 14:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fd7e7a316d7bbb6149c5efadfb6ff5a SHA-1: a1921780340ae0489d708c52be20a3a51d7b325b SHA-256: c829922df5da4f17c5da9d3df66773f35942c6edf1fe08d40a827dd868c1bfbd
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of these links, https://ttraff.com/wix?keyword=analise+morfologica+exercicios+com+gabarito, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same keyword, suggesting a lure to disguise the malicious intent. The primary attack pattern involves tricking users into clicking on malicious links disguised as legitimate content.

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/wix?keyword=analise+morfologica+exercicios+com+gabarito
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/anti_inflammatory_diet_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/vesimofanibufovexagodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9564/5589/files/wozolafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/banded_iron_formation_important.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3cc08bbea914980af47646a1456721e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/zoxikowufigarowixaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2692/3172/files/xuxebuzativoxesubijixal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/luxeterod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7750/9020/files/jeliwobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/1690782439.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/pdf_to_word_converter_arabic_support_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/61138244347.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/forestry_bees_chart.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_off00006867.bin
a1894ec265bc19c9056d747c0244a696431cdd88ef23c7deeb77b832828e0fff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 5400 bytes
font_01_sfnt_off00007aae.bin
f0836d8d1417185ef0f846ee611b347d852418d4c9ab712cad148032be6e5b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAE 10120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.