Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31dd1947f52a04c…

MALICIOUS

PDF

43.6 KB Created: 2020-09-04 09:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c002df46bcbb6052883b03376e402d1 SHA-1: 65665b0147efac4f795fff1d5274228f521d4dfb SHA-256: d31dd1947f52a04c4e20dacaef82d38e1517425062643fd3e6c3ae604cf6e732
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=cisco+webex+calling+deployment+guide'. This URL is presented within the document body, disguised as a Cisco Webex deployment guide, likely to trick the user into clicking it. The PDF also contains a link farm heuristic, with numerous links to PDFs hosted on Shopify, one of which is 'https://cdn.shopify.com/s/files/1/0437/7047/8746/files/munusileluxe.pdf'. The primary malicious link is the most critical IOC.

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.me/wix?keyword=cisco+webex+calling+deployment+guide
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/munusileluxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/50226663102.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/classeur__levier_grand_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/61408915943.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/coreldraw_2017_getintopc.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/yaariyan_akela_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/pediatric_pneumonia_guidelines_canada.pdf
    • https://static.usrfiles.com/ugd/07e02c_690b5417abb041d4a2f54416de40cca6.pdf
    • https://static.usrfiles.com/ugd/ea2f88_8fb5ded1dacd4f5b9b89ddc0714ba93d.pdf
    • https://static.usrfiles.com/ugd/d17951_c5e27875ac7342a6969bee1ea211e9f8.pdf
    • https://static.usrfiles.com/ugd/0c41e7_32e52a446939496e89c7f3e2243f182a.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_1681bd226ac2411f91ed91efe839ae0f.pdf
    • https://static.usrfiles.com/ugd/9219f8_cb010659b8e24088ac9c55f05950f50b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6741f90b353c4d09a2050c093fafc4bf.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_off00006a85.bin
87ca0848887ede147461e9b5360d1de1d1591661f0f048742d372a98e82d9ce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 5604 bytes
font_01_sfnt_off00007da4.bin
7bfc57a15310edbb72d746ee89c4c290064efa2fa844487d8699a0dcda59c67b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA4 10420 bytes

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