Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bef8157d7ad36b…

MALICIOUS

PDF

49.7 KB Created: 2020-09-01 07:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e76beb664d9cffe91fb1ff9553382f0 SHA-1: 26b259402d4f539c0c1e094150b509502ae0c44c SHA-256: 44bef8157d7ad36bc6933793772e91f09e61643329eb1ddbe2829229f3964c68
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/wix?keyword=android+vs+ios+market+share+2017', is designed to lure users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded links pointing to external PDFs, suggesting a broader campaign to distribute malicious content or manipulate search engine results.

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.ru/wix?keyword=android+vs+ios+market+share+2017
    • https://static.usrfiles.com/ugd/b8c837_22a277fea62c494f8fa2f190366ff8c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b5ebd256dde43ee9e7d590fd8e33569.pdf
    • https://static.usrfiles.com/ugd/760101_e650df5f5d6c4d73b986feae39908317.pdf
    • https://static.usrfiles.com/ugd/b8c837_63cd8ecda8ed449b9749c582424109e4.pdf
    • https://static.usrfiles.com/ugd/cafc24_f6fd421c92074daf96dcdac59547bebd.pdf
    • https://static.usrfiles.com/ugd/b8c837_cda37eaa1d2243e7ad204dc883723ec4.pdf
    • https://static.usrfiles.com/ugd/99965f_ee5f27a27a024a9ca5bdefab1ed185da.pdf
    • https://static.usrfiles.com/ugd/87a178_b0f43caccd38415989def52d491ad5a6.pdf
    • https://static.usrfiles.com/ugd/e2b09b_4ef0b55fb79545749650b8d40d54212f.pdf
    • https://static.usrfiles.com/ugd/69695d_3e40320534e8418d8db26ce2573d7244.pdf
    • https://static.usrfiles.com/ugd/73f3b0_e9a70d53dca94d19b4260a2070d1abe3.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/vmware_hol_labs.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/cable_one_prescott_az_channel_guide.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_off000083be.bin
c9cdf786b8345c1a21cc6aaeeef9a40d62418a0a9d1340c0c3b44687aafd0c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83BE 5552 bytes
font_01_sfnt_off00009682.bin
ae1590f8d9843431069853ddcf16173aa2b99ebbcd00430c53555bb6a8ecf27b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9682 10544 bytes

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