Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a35c41ce4c83811…

MALICIOUS

PDF

55.6 KB Created: 2020-08-19 00:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26251bda0fa7091633ddce4235393bea SHA-1: 80d3143b01f8dbb7d95ee58dffedb47bc8f109f6 SHA-256: 7a35c41ce4c83811c4d94e159904d294cc0591254db2b6a60af32d99ba3d9bf9
130 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, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The presence of a 'download button' heuristic further supports the lure mechanism. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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.cc/pify?keyword=free++brushes+for+photoshop+cc+2015
    • http://files.eastcincyogaschool.com/uploads/1/3/0/7/130738988/fanewidop.pdf
    • http://files.beaute-totale.com/uploads/1/3/0/7/130776720/03063.pdf
    • http://files.asttowing.com/uploads/1/3/1/4/131438379/lawin-rikixegowudi-kusunego.pdf
    • http://files.thesourcemassage.com/uploads/1/3/1/4/131437657/2f759.pdf
    • https://cdn.shopify.com/s/files/1/0440/1014/3902/files/94901446023.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/wubagufozomeripijene.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/bulivutifubu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/judowesababun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/ganufixisusupomotopezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/40089086142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/8757906048.pdf
    • https://cdn.shopify.com/s/files/1/0439/0925/1227/files/sasogorofunaxujugonete.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/vetokazizopimipes.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_off00009c38.bin
5c1eb3e7032dcea1f1c8979040f822a9c6480433e4c8f4558e8345c423f598ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C38 5404 bytes
font_01_sfnt_off0000aeab.bin
9cc9039b68ee1588eeb4dc9fd3eb4f90d0e8ecdc1fdf253324429a5424c8c515		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAB 10148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.