Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd547562d9aa1c3…

MALICIOUS

PDF

34.7 KB Created: 2020-08-19 23:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75be9f7ea074103835459e020551f955 SHA-1: 7c2c04fc47b24c07d714eb8dfb2d41de78903db4 SHA-256: 3fd547562d9aa1c37871ab0b52a59f03875475718130c4751f9e749f05152fb7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, specifically 'https://ttraff.cc/pify?keyword=calculating+acceleration+worksheet+middle+school'. This suggests the document is designed to trick users into visiting malicious sites under the guise of providing educational content. The presence of numerous PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious 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.cc/pify?keyword=calculating+acceleration+worksheet+middle+school
    • http://files.minilivestock.com/uploads/1/3/2/7/132740415/38a223c.pdf
    • http://files.oceantreeyogastudio.com/uploads/1/3/1/3/131379189/suraluxeveji.pdf
    • http://vowidojo.dianasofiaestrada.com/uploads/1/3/2/6/132680813/7726063.pdf
    • http://files.aucoproductions.org/uploads/1/3/1/1/131164063/28302e86d68.pdf
    • http://files.chungmark.com/uploads/1/3/1/8/131871778/xinexeketopiv_suzevuxololow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/bridge_to_terabithia_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/food_waste_management_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/14406764715.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/bofinifivisafi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2209/6283/files/waiting_for_godot_analysis_themes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/526952073.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/52550788699.pdf
    • https://cdn.shopify.com/s/files/1/0440/2642/9605/files/81962812550.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/bivitexedojutobimew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5415/files/logujikajik.pdf
    • https://cdn.shopify.com/s/files/1/0437/1673/9222/files/ragovulazetugasena.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/aristoteles_e_dante_descobrem_o_segredo_do_universo_lelivros.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_off00004a7e.bin
a5d6e1884618df37fb20a3037a4a116256674023d514cbea64847126a78eb726
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7E 5416 bytes
font_01_sfnt_off00005cc5.bin
28d428574036da128fb546243dae84c161d2dd8d8f553cc09009c1b7455b4842
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC5 9588 bytes