Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd21668a4828cd46…

MALICIOUS

PDF

40.9 KB Created: 2020-08-13 23:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6deef0efe290e67bf9ce9fde5e10cc18 SHA-1: 3c8367d2c270565eb90df0d2a61780fc6903dad3 SHA-256: cd21668a4828cd46b9597d2464d71843b29b7e57b114aa84b77477bf4b4a09ed
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDF documents. The primary URL, 'https://ttraff.ru/pify?keyword=nelly+dilemma+excel+spreadsheet', is flagged as a malicious redirector. This suggests the document's purpose is to lure users through a series of links, ultimately leading them to a malicious destination. The presence of a link farm and a malicious redirector indicates a probable phishing or malware distribution attempt.

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=nelly+dilemma+excel+spreadsheet
    • http://files.jonathanacollura.com/uploads/1/3/0/7/130740217/metupuxofi.pdf
    • http://xigubavum.performancevolleyball.ca/uploads/1/3/0/7/130776760/givifozobekaza.pdf
    • http://xofewobu.fridayflyfishing.com/uploads/1/3/0/7/130776208/xakaxi_kilerixuzile_dipogafusu_mufuvima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/49740939834.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/94464465884.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/cet_2020_karnataka_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/vijilusitupofatenavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/setapikukogebofigatetoku.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/fugikutebip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/69804076383.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/blood_magic_binding_ritual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/tanab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/5852813283.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/15835315797.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/pedabejefejegagidij.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_off0000603d.bin
bd2547cf4101ac17fc78a11891956d1d8cbd35885948d0f81e2fac9e0ea16290
pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 5452 bytes
font_01_sfnt_off000072b0.bin
12a7799cdddd4760fb67d716d4f545d19f8146495b27fd7aa578b2e945815a74
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B0 10620 bytes