Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9bdf0ecbd9a49f…

MALICIOUS

PDF

44.4 KB Created: 2020-07-18 22:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61934ccb07d24abec7cb574e6f9e43e7 SHA-1: d01ab867ec2543b6733109d3412ab8d6240fca97 SHA-256: 7a9bdf0ecbd9a49f7bb179005d596442e46d810d438c1e2c927c4e88f255be52
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL that mimics a search for 'adobe pdf reader latest apk download'. This, combined with the PDF_SEO_LINK_FARM heuristic indicating a large number of external links, suggests a phishing or malware distribution attempt. The embedded URL is designed to trick users into downloading a fake PDF reader, likely leading to malware infection.

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/wb?keyword=adobe%20pdf%20reader%20latest%20apk%20download
    • http://files.beavercreekbaptistchurch.org/uploads/1/3/1/0/131070379/fenodof_wekis_widosoxasetif.pdf
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdf
    • http://files.theshrubberyllc.com/uploads/1/3/1/4/131454383/juzigi-gosotoguz.pdf
    • https://leludibowen.files.wordpress.c
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/sexelafikulawozuboxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/xivitowinis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/28864897207.pdf
    • https://bexojasal.files.wordpress.com/2020/07/20575696060.pdf
    • https://leludibowen.files.wordpress.com/2020/06/rogoxolodi.pdf
    • https://rekinirive.files.wordpress.com/2020/06/801059761.pdf
    • https://govizugag.files.wordpress.com/2020/06/93560740591.pdf
    • https://jezowiv.files.wordpress.com/2020/06/vimup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/wifusuletidimisos.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/tudazuzemopedafisalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/rujanurisilumipan.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/jalodaxelevevikevixug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/kewusenujigupisum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/wamusuzalilugaguxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.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_off00007086.bin
a5ad8830c06f68bcd9340cf7f96c6a03f20502f32f8fba175c7cc6e7ba88f9c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 5060 bytes
font_01_sfnt_off000081cf.bin
d099c3d24c9c83078794f74813b3bc4e15fe8377813272683c660598133b9873
pdf-font-stream PDF embedded font (sfnt) at offset 0x81CF 9980 bytes