Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcb8d7b760e505b…

MALICIOUS

PDF

50.9 KB Created: 2020-09-05 00:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 903f0da38d66e9ebd3a0baeedae7eadc SHA-1: 4320363b06e87ecdd1d504e3bf303e1f90e51721 SHA-256: 2fcb8d7b760e505b00a1cf091a9eabd1d7b56407d734f46d70e2af32101e2880
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The embedded URL https://ttraff.ru/wix?keyword=childrens+bike+size+guide is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Childrens bike size guide' and the malicious URL, suggesting a lure to a phishing or scam site.

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.ru/wix?keyword=childrens+bike+size+guide
    • https://static.usrfiles.com/ugd/3fc21f_e894beaf2fe44e9da6e281533dbea123.pdf
    • https://static.usrfiles.com/ugd/98857b_00f76ca85ebd40ccb23ce121d4a92907.pdf
    • https://static.usrfiles.com/ugd/c33cdb_c24dd456e5c445bfbea84048c5580b70.pdf
    • https://static.usrfiles.com/ugd/9d66c7_94d7cc2d68264ce48c6558476039321e.pdf
    • https://static.usrfiles.com/ugd/824332_fe44dff5caa949e88b561e80c21c4161.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2298079133140999817f0eb7840f75a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0966f76519d5435fb58d3384d9b6cfcb.pdf
    • https://static.usrfiles.com/ugd/3d0627_5da7437fb1dc4b8ebf4ef596b0c19c9d.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/difanuxilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/33187687627.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/91032454901.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/pdf_to_dwg_converter_with_layers_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/47672469852.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/ziget.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/votokefefinepilabij.pdf
    • https://cdn.shopify.com/s/files/1/0433/5517/7109/files/35687876937.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/69850907422.pdf
    • https://cdn.shopify.com/s/files/1/0455/5482/7429/files/chemistry_formulas_list_for_class_10.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b1c.bin
dcb7497812bb648ab99706b194eba5264c1b2cd97d3ff4d527672ffa1e2eef8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1C 4848 bytes
font_01_sfnt_off00008b7b.bin
3824a420bfbb78f78a71aa78798790ef20b3769d2fad1cd8fe1063f67c7d70e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7B 10956 bytes
font_02_sfnt_off0000b013.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB013 4324 bytes