Malicious PDF — malware analysis report

Static analysis result for SHA-256 d622a83d139cb027…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 12:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96194876c4af05eab5609863a0ada6e8 SHA-1: 271163c3b7bb0a1e6b0e621a6b1f830f8b06805e SHA-256: d622a83d139cb027fb59125f1fd610a6fd8e347145d0eb8664a902247eec5274
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though partially corrupted, contains the text 'Hikvision error code 153' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which point to benign content, but the primary malicious link is clearly identified.

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=hikvision+error+code+153
    • https://static.usrfiles.com/ugd/50c35f_2bd1c2e004e641199339e593873cfcf8.pdf
    • https://static.usrfiles.com/ugd/23e9be_3668105e85e34c1ca374118ca99adde9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7b84a85274040a1a83fb8eaa6489d3c.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6160/files/bacteria_structure_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/59469081710.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/61170305928.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/15756135830.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/37945544265.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/itextsharp_text.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/towufud.pdf
    • https://cdn.shopify.com/s/files/1/0434/3195/2536/files/dubujenevakuxuxofuzi.pdf
    • https://static.usrfiles.com/ugd/b8c837_4de5c01c304244a2830e8bc241186176.pdf
    • https://static.usrfiles.com/ugd/c345b0_a1169c4594f542f0af78883690d3298f.pdf
    • https://static.usrfiles.com/ugd/05900a_adbce4c3d77145e5a6594b9d5f4c3a02.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_003a096d9e964f9ab4faa8faa1394a58.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_off0000607e.bin
f0e3ddad92c6e356a30788b814d07715895d206db03d3239fa98cf021e2afc40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 5116 bytes
font_01_sfnt_off000071f8.bin
b4ce6eab9a167547e15115b587d278580ba4756d142d6cbf18af13157d34422d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 9720 bytes

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