Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c4fb6584b66e78…

MALICIOUS

PDF

42.2 KB Created: 2020-08-28 06:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e45efa04a6836b54d3140e144a17a0 SHA-1: 8ccdd3c45a60b448fdcb1c8c62ae5d306dcb1f62 SHA-256: c4c4fb6584b66e78b55d3ea3173dde3299baa713ebfe3cab19298024b178c154
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of these links, https://ttraff.ru/pify?keyword=o+urso+polar+%25C3%25A9+branco+porque+vive+na+neve, is identified as a known malicious redirector. The presence of numerous links, including the malicious one, suggests an attempt to lure users to malicious sites or to manipulate search engine rankings.

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=o+urso+polar+%25C3%25A9+branco+porque+vive+na+neve
    • http://files.carrolljazz.org/uploads/1/3/0/7/130740112/gibopijoru.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/install_postgresql_mac_brew.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/mobovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3609/files/86921761129.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/sanojukadifamotowowebag.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/jamazo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/9562415741.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/lememawovesigapovunulegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/gray_s_anatomy_book_40th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/zajasilonulojirivekubumuj.pdf
    • https://cdn.shopify.com/s/files/1/0462/8162/1664/files/xezaposepumizunopotebomup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/62496442344.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_off00006247.bin
d7b154e1adca2b443f3980f10b9e1b8aff6c4c6a11951a9f64bea932473b0685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 5424 bytes
font_01_sfnt_off00007486.bin
25923f8779a0a35b648d8f95d0e3ec8beac7742d07eb2a0fd930a03eea261f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7486 12236 bytes

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