Malicious PDF — malware analysis report

Static analysis result for SHA-256 916e85a378a321b5…

MALICIOUS

PDF

45.2 KB Created: 2020-09-03 08:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ac6b0dcf9b05c26242ba806de7a7464 SHA-1: cda64bbbd315483093d1af3ce57e2fb4f8751ebb SHA-256: 916e85a378a321b5c025f419651ff986f2bb162aab5be337b17742d657fcc0fb
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Symmetry worksheets grade 3 pdf' and a URL that appears to be a lure. The primary malicious URL identified is https://ttraff.me/wix?keyword=symmetry+worksheets+grade+3+pdf, which is likely used to redirect the user to a malicious 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.me/wix?keyword=symmetry+worksheets+grade+3+pdf
    • https://static.usrfiles.com/ugd/10e3af_89bd4bb8a1f9456da50d512ef9baeb7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0f8ea63f4914060bdd63a13a00a6487.pdf
    • https://static.usrfiles.com/ugd/868f76_b875c63406214388a43992ca4af89172.pdf
    • https://static.usrfiles.com/ugd/cb4a18_c936c3180327456c8996a8ded667bd53.pdf
    • https://static.usrfiles.com/ugd/5ad03d_6cc226bda34340b7b161c29a473a4b71.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/jusedawasanusukibujabip.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/35550174946.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/fofupekejaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/daruguzisunelimawibimavil.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/reacciones_de_alcanos_y_alquenos.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/australian_visitor_visa_online_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/kaxukajofisugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/xemizot.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/56404707721.pdf
    • https://cdn.shopify.com/s/files/1/0463/1022/8133/files/84190438285.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/tebanomenevazovadid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9975/7474/files/information_about_adaptation_of_polar_bear.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/56998538304.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/55178672508.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_off000070a0.bin
c7b21927a4b57a3f202375621e6e69c4e388989333e60efd3594c4d8683cd4c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A0 5948 bytes
font_01_sfnt_off000084d0.bin
870dafc03284ca9df708e35b60d1539eb12ec5a149fc4633c9bfabf03b4f9073
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D0 10072 bytes