Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cdef39308cf29fb…

MALICIOUS

PDF

42.5 KB Created: 2020-07-28 02:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82635ba8859a42656f0f9e095097d280 SHA-1: 56182c54ecef4c7db93c39d716f8cf2f72707a02 SHA-256: 3cdef39308cf29fbf592e5c93bb0b50c4c16ea4bb9df2d9941af553c9835f845
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a lure related to a 'Consumer reports magazine discount subscription' and includes a heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text fragments consistent with this lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting an attempt to create a link farm for SEO poisoning or to host payloads.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/pify?keyword=consumer+reports+magazine+discount+subscription
    • http://files.theapostoliccommunion.org/uploads/1/3/1/0/131070792/6551103.pdf
    • http://files.unityofheartfalmouth.com/uploads/1/3/0/7/130775515/rorifovoxotu-jigezolisogizol.pdf
    • http://files.colorblast5k.org/uploads/1/3/0/7/130776728/591498.pdf
    • http://files.colorblast5k.o
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/49447756821.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/turadufireburuwevawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3980/8922/files/fefazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/74954830917.pdf
    • https://cdn.shopify.com/s/files/1/0431/2386/7805/files/17987958296.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/7489917499.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/50242546739.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5424/files/98117159982.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/gugax.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/97860196840.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/5717637249.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/59671231326.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/zutesinekazuwoxowixe.pdf
    • https://cdn.shopify.com/s/files/1/0440/4638/5317/files/fegozuzamifubawedonikow.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_off00006645.bin
7fa6b5a396e2ee2b1c2f4c379f0d14d5f35ec8bea4067b5201a1d8b3633e9dcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 5456 bytes
font_01_sfnt_off000078b7.bin
789862a30a869fe81640588fbaf03c773e34c5b420a0e013bb3cce882557bb55
pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 10440 bytes