Malicious PDF — malware analysis report

Static analysis result for SHA-256 c838d1dd132700aa…

MALICIOUS

PDF

34.2 KB Created: 2020-08-31 03:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48bbba89e3974ddae951ba3b01360d7e SHA-1: 5e12bc6ab870233c0e426917efb822959584b67e SHA-256: c838d1dd132700aa44e9dbe024153bdaaca0ff8ef2f9ebdf085c2b5c3291119c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=jwi+filter+press+manuals'. It also exhibits characteristics of a link farm, with numerous embedded URLs. The document body, though partially obfuscated, contains text related to 'Jwi filter press manuals' and includes the malicious URL, suggesting a lure to trick users into clicking the link. 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=jwi+filter+press+manuals
    • https://static.usrfiles.com/ugd/b8c837_99ee0ff665684b2c9ee38b46c1062274.pdf
    • https://static.usrfiles.com/ugd/ea78e0_b1eae354dd4940d8be52437d389e40fc.pdf
    • https://static.usrfiles.com/ugd/9ec29b_23562f431dbd447a8a6f4fca3f926919.pdf
    • https://static.usrfiles.com/ugd/c068f8_6fc4a637c9dc42a3bd63d7e7b8153d2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_462a32b997ce4dbf8f8589a801444202.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/kopopuboz.pdf
    • https://static.usrfiles.com/ugd/e33828_e1a34113d9034b39a376a2f1f257a8b4.pdf
    • https://static.usrfiles.com/ugd/c0b427_ca6e6bc4e3124a4f8e2b598622d74d3a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/8454161499.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/3d_max_tutorials_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/70439301517.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/jujodiwotorumitol.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_off00004a4a.bin
d88c15cd54a2126de7c8dda946138dd02107f51f75fc45d1994f75b327e9c858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4A 5128 bytes
font_01_sfnt_off00005bb2.bin
d08e0f60e73b6612c3d76e8e22561837d6d547b3655ccce981d60a1bb19791df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB2 9568 bytes

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