Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4d62b1d3277059…

MALICIOUS

PDF

54.6 KB Created: 2020-08-09 22:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 915989abe3dc1bd39293d2b734735abc SHA-1: e635148a0649ee9138e105f9b6eea13cbe96d9c9 SHA-256: fb4d62b1d327705929b19252e3b6bcc09b52232d2cff6127475df2e2771ed6c9
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=yii2+tutorial+pdf+download'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains references to 'yii2 tutorial pdf download' and the URLs, suggesting a lure to download malicious content or be redirected to a phishing 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.cc/pify?keyword=yii2+tutorial+pdf+download
    • http://files.flxcalendar.com/uploads/1/3/0/7/130739328/lenenujeno-xanurijezexu.pdf
    • http://files.juniatacountytroutclub.com/uploads/1/3/1/6/131637362/4272173.pdf
    • http://files.zenyasastudio.com/uploads/1/3/1/8/131858661/kesajazetaleduned.pdf
    • http://vijibave.friendsoftosadi.com/uploads/1/3/0/7/130738779/kanuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/2824/0794/files/history_capsule_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/xirituzedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5481/files/vugalusumiwesaxujora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/75931473935.pdf
    • https://cdn.shopify.com/s/files/1/0440/8174/1976/files/14727642032.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/what_is_vz_navigator.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/mil_std_810e.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/nitenune.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/30084425421.pdf
    • https://cdn.shopify.com/s/files/1/0437/3882/4858/files/github_commands_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/lupun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/nabafuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8364/5599/files/1688217149.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_off00008a91.bin
3270cee7f9ccc6e354dfdda5aba950d2afa45ce787335881af69181e19e8288f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 5044 bytes
font_01_sfnt_off00009be0.bin
feb1fd36aacf3561d030a6f71890dfc58b05e0cc43c36769ff6f2f046b5122e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE0 15988 bytes