Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf1198fa55a23d5…

MALICIOUS

PDF

46.5 KB Created: 2020-08-11 23:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49ab5e0bc22d1a0e50a34bd4e29117d2 SHA-1: 4b4f25c606e3101452366de0e678a1cafac75041 SHA-256: cbf1198fa55a23d565770806bd832a1d7fed7a198c20ce8df9a48db0d0828f15
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, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though partially corrupted, contains text related to medical conditions and the tool used to generate the PDF, suggesting a lure to disguise the malicious intent of the embedded 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.cc/pify?keyword=diferencia+entre+angina+estable+e+inestable+pdf
    • http://fuvevubab.16burdens.com/uploads/1/3/0/7/130739267/jadafu_sorutaz_vaziturik.pdf
    • http://files.ymov2010.org/uploads/1/3/1/4/131438899/8524642.pdf
    • http://files.computerdispatch.net/uploads/1/3/1/4/131409677/fotaxaridix.pdf
    • http://files.tristaricelandics.com/uploads/1/3/1/4/131453618/713540.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/inkscape_convert_to_svg.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/pom_xml_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/ncert_class_12_biology_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16216600544.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/gosijik.pdf
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/83825169559.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/nowimibutixomoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/49942024855.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/wuronukarit.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/rudinemerunubog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/makewozemovozovafoli.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/44346953222.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_off00006b12.bin
192e9d533813016a4e0c1bdb71cadcb8b9c4887b6438c1ff1c773a8132389105
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 1604 bytes
font_01_sfnt_off00007336.bin
21650c0c7242927f33ee908c42a16d79fb6510c4a9633b7d902d7006d63ea2d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7336 5464 bytes
font_02_sfnt_off000085d1.bin
8faedad843f54559e792d737cee54ee6d3fa6d3a593156900bdbfb5ed4a4c0e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 11276 bytes