Malicious PDF — malware analysis report

Static analysis result for SHA-256 368fd17f58ff3e3e…

MALICIOUS

PDF

46.8 KB Created: 2020-07-31 04:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3acfe0fb2fa98d5815acaa0a1b0a710a SHA-1: 173e46c4ed7638ae9cfc56214805ca029902ccb3 SHA-256: 368fd17f58ff3e3e35c8bf21578c5450254c6c96dcf660f98b9c9c268cd08d22
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=punjab%20textbook%20biology%209th%20class%20pdf%20free%20download'. The document body, though heavily garbled, contains text related to 'Punjab textbook biology 9th class pdf free download', suggesting a lure to trick users into clicking the malicious link. The file also exhibits characteristics of a link farm, with numerous external PDF 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.com/wb?keyword=punjab%20textbook%20biology%209th%20class%20pdf%20free%20download
    • http://files.stephaniemiracledances.com/uploads/1/3/0/7/130739991/08f9e.pdf
    • http://files.beadsbybrandy.com/uploads/1/3/0/9/130968958/73d68c0cd433013.pdf
    • http://files.veranijveld.com/uploads/1/3/0/8/130814232/fugixakewakunokol.pdf
    • http://files.be
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/56041328749.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/43805532162.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/88410641068.pdf
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/kediwufar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/fenodopelatitaje.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/56551081369.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/bowijefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/lewebudorarowajojufe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1684/6488/files/latepoderopaxakajajitebu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/93513100600.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/babof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/24579016899.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/84821124104.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_off00007753.bin
6d45c560698260e7bbccada8d3fdf6ac22e473b868ce5bf71b8f55e3a4e91b48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7753 6000 bytes
font_01_sfnt_off00008bcf.bin
90755b09082f02bc0f4901da4858407610ce0c475847b33b54b85701867249fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCF 9812 bytes

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