Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55a41e465fc114d…

MALICIOUS

PDF

43.9 KB Created: 2020-08-17 10:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ee72712d869efdd9c4c9ef0a50dd5ab SHA-1: cc323e8c2b53592f8956cebbfb25f8a540ece790 SHA-256: f55a41e465fc114d7679e49a150f083b6f96c79c28edefec44aa5a30b41b22a8
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 URLs, many of which point to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains the same URLs, reinforcing the idea that the primary function is to distribute these links.

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=balanced+diet+information+ks2
    • http://najepak.cainedelup.com/uploads/1/3/1/3/131380213/5a5bca.pdf
    • http://jimefoxip.stringtheorytennis.org/uploads/1/3/1/1/131163599/2415800.pdf
    • http://tiseti.greenrivermwc.com/uploads/1/3/0/8/130874359/2668375.pdf
    • http://files.andrealapinski.com/uploads/1/3/0/9/130969448/c06efc4605fa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/totinajimudipedivetukim.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/pufomomisemuwatikodiruwu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4237/1741/files/diritasapotinijiviwixope.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/60370396802.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/75708539825.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/78656799620.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/bhatti_vikramarka_kathalu_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/lewoparaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/8029323080.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/vorozikowibubojukutomuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/90045552011.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/29755983100.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_off00006e57.bin
81d8971468f2ddc80d6cc2f2262364b304da8626698d9a78d8729c4445bf48e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 5412 bytes
font_01_sfnt_off000080a7.bin
a673f9081daef4c8bc41fb034e4cd7799532fb3feeacf3d9fe832d1b3d934d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 10004 bytes

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