Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de31fcdf1fe09e4…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 15:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b8df44350d543e15dd0561b4389bf5f SHA-1: a196285bbed4321bd4679073a41311e0c3238735 SHA-256: 3de31fcdf1fe09e4d5f910de113e3813f8f85b56c2cc5ece5841c054a36b722a
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to appear as a training manual, with a primary malicious redirector URL. The heuristic firings indicate the PDF is a malicious redirector and contains a large number of external links, many of which point to benign content but are likely used to mask the malicious redirector. 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.com/wix?keyword=north+zone+training+manual+hose
    • https://static.usrfiles.com/ugd/87a178_d53b298ba17f4d6b817c4374a44c535c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6ded65ed64640508ddf66f5508659ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdf5f146ca094003854c4e8304bba7de.pdf
    • https://static.usrfiles.com/ugd/913720_734ef2a596d04558abee147959dd1bb1.pdf
    • https://static.usrfiles.com/ugd/b8c837_def89ea1257645e09c74abcd83d51160.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/wawuzeriperisunu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1260/1502/files/al_quran_indonesia_free_download.pdf
    • https://static.usrfiles.com/ugd/57c819_303fc8a44bcc414d997ee176d538e255.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e9fc9db0e64478096045226b572b620.pdf
    • https://static.usrfiles.com/ugd/1a89c8_a950ab27cfcc4a4381f7f7de56d3471b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d11e7ab723e474db2ac34467a97e171.pdf
    • https://static.usrfiles.com/ugd/87b9a8_9cc656e04243427eb891a02e648d0715.pdf
    • https://static.usrfiles.com/ugd/f4de5e_b51447a597ea4eb9a80568cc30681be0.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_off00005f3f.bin
e8d5ef8d6b05c899c177eb21ea756e5b0455299cab15cf3a810d112294eb7a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 5120 bytes
font_01_sfnt_off00007089.bin
c744703541440b924c04d37211276d1552646926a7b70e86dcc05b20b6e211ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7089 9724 bytes

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