Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b5a7f65ca0eb01…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 21:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25aa96de4a1ba2ed130aa1536a17434a SHA-1: ebd887cf26295f130b4b63c52cdca93053920166 SHA-256: 22b5a7f65ca0eb018b089460759946f6691e031053f1a8f82c54fabac23d68b4
130 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which is flagged as malicious. It also functions as a link farm, with many embedded URLs pointing to Shopify, likely to improve search engine ranking for the lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. No scripts were extracted, but the primary attack vector is the malicious redirector.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wb?keyword=managing%20human%20resources%207th%20edition%20pdf%20free
    • http://files.frigatebirdfishing.com/uploads/1/3/1/3/131398428/lebikowag_pukamotedudofux.pdf
    • http://files.dlake.net/uploads/1/3/1/4/131409017/5704725.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/16559726590.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/difevuzelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/38368756502.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/8078202519.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/niloledelotodawejubibilal.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/52685219439.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/25089503964.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/lizenumogenapalin.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/vefukulopisuwadojijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2969/1558/files/filepugozitepuzaketinaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/19410411315.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_off0000646c.bin
2351659fd60dbe5d24aeea6f63081c9f3cd1e453a8215bb8d0f447033d564d41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646C 5620 bytes
font_01_sfnt_off00007766.bin
ba0959683966120fa5de94b8db00f270ca3625bb1336c9920a32a33a3a5b7328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 10504 bytes

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