Malicious PDF — malware analysis report

Static analysis result for SHA-256 d888020b4430a26e…

MALICIOUS

PDF

37.0 KB Created: 2020-08-01 10:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 475bd5791b88e936585e97cb58aa96f1 SHA-1: c0b82b577e4bc8451ca7bfdce9c99e7033b03697 SHA-256: d888020b4430a26eaab919776ea7ccae16f62e8b802b8235af0b0dc25aff60e4
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic flagged a link to a known malicious redirector infrastructure. While no scripts were extracted, the sheer volume of links, including one pointing to a suspicious domain (ttraff.ru), strongly suggests a malicious intent to lure users to potentially 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/pify?keyword=hk+g36+22lr
    • http://files.jared4rabbits.com/uploads/1/3/0/8/130874207/e5263b5bcce.pdf
    • http://files.echoingwindsiberians.com/uploads/1/3/1/3/131381031/9346448.pdf
    • http://files.bobbijasayphotography.com/uploads/1/3/1/8/131856270/4caf862af9ca1.pdf
    • http://files.ledrapyrography.com/uploads/1/3/0/7/130775198/tefudofat-nukosulojekixep-wadumasogezolej.pdf
    • http://files.theoaksmith.com/uploads/1/3/1/0/131069860/nofotarekaniz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4355/files/sorepuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vizinedidobirefeguj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/wuvidokimojakapab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/45251868364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7792/files/supersu_2._82_zip.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/70570103522.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/remove_n_from_string_python.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_off000053d0.bin
87104b5ef344781c1a8d9421dd1027d7e02a1ab45861635932a56562a4d280ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D0 4940 bytes
font_01_sfnt_off000064b5.bin
f1aa2fce0ae29954bb1707e75c1c8ba9316fad80417a3b16de7499dd0f298848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 10196 bytes

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