Malicious PDF — malware analysis report

Static analysis result for SHA-256 514e970db9749170…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 15:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 400da2f26d097a650b0a2f6ea5400f65 SHA-1: bbe1dbf232f266a82d57d80ee7aae4247d83024a SHA-256: 514e970db9749170fa723c6b1b1ce410036b2a9f7ec0befdf49fbd0270f4e498
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a malicious redirector link, https://ttraff.ru/wix?keyword=frases+para+el+llenado+de+boletas, which is likely the primary malicious payload delivery mechanism. The document body, though partially corrupted, contains text related to filling out ballots and the authoring application, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users to harmful content.

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=frases+para+el+llenado+de+boletas
    • https://static.usrfiles.com/ugd/b8c837_ad2a0f22c7be40129c68c2f642b7d6ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e07387318ce4705b798c2e772f050b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d307585f8fdc43e7ab79e7c39acc6d58.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec3edfbd5ac74a0994f2828b8d9f8f64.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/61967785640.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/simcity_4_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/kizolonozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/9714366209.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/96626570903.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/badedulumolumu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2156/4066/files/nowilafuguxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/resume_and_cover_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/6915/2159/files/68543710775.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b35804b4e1b42b0b027bcbe58865553.pdf
    • https://static.usrfiles.com/ugd/b8c837_353b0119927641cb82803edbdeb8fc6f.pdf
    • https://static.usrfiles.com/ugd/6240f8_3b37e60d672442ab822c5185b855e2cb.pdf
    • https://static.usrfiles.com/ugd/aef5b7_fbe2f33c26c84a66908cbecf3a2ab3a5.pdf
    • https://static.usrfiles.com/ugd/e8506d_bd2511ebe0384a6a8d30c9fec88ac047.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_off00006a23.bin
27bc995f8c37bd9d938bbf5b130a91eb4a0e88813cc0d7dfdba19e1c30963ee9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A23 5048 bytes
font_01_sfnt_off00007b52.bin
ca7a42a304012fb4499658b8f526c25aedaf8c45ddf0ed7d7e4f97b7c3ba264a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B52 11296 bytes