Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc9dc4e18c0594d…

MALICIOUS

PDF

49.9 KB Created: 2020-08-11 04:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd0d76084966729e75b5812b5c2f651 SHA-1: 2e9ec727c29edbe1a0e7e1f183748fa2fd8b3ebd SHA-256: 2bc9dc4e18c0594dc81218f6c1f7111bb3c92a0f36f6398c84d44a9cf0e6ca6b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO link farms or to distribute malicious content. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=kirchhoff+s+law+physics+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure users to this malicious site. No scripts were extracted from this sample.

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/pify?keyword=kirchhoff+s+law+physics+pdf
    • http://lumaposi.spankthecarp.com/uploads/1/3/2/6/132683071/vugokiwekebupeg.pdf
    • http://nuwek.adventuresinfaith.us/uploads/1/3/2/6/132695818/17dbb.pdf
    • http://files.accordingtophillips.com/uploads/1/3/0/8/130874647/5851124.pdf
    • http://files.blackstrait.com/uploads/1/3/0/9/130969241/nazizigafev.pdf
    • http://gumiden.stephanieteresesimonmusic.com/uploads/1/3/2/6/132696414/4849743.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/41221452104.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/dunanojaweruvelaneguki.pdf
    • https://cdn.shopify.com/s/files/1/0436/1591/2098/files/11504284563.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/venukedajizowagamipawetu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/download_partynextdoor_two.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/rifexaxugaxuxuvojiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84593422723.pdf
    • https://cdn.shopify.com/s/files/1/0431/8992/8096/files/halloween_havoc_1998.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2231/files/55779663255.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_off00008503.bin
a7ec2ed74f2bf4b2625b3d78db457415101c5861642ab345ceae8504bc178677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8503 5404 bytes
font_01_sfnt_off00009775.bin
4e9950b57fb904557ca5bc691e9d687ba4723cb82c3724f2d693426ac62d146d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9775 10396 bytes

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