Malicious PDF — malware analysis report

Static analysis result for SHA-256 be66102c47376c43…

MALICIOUS

PDF

47.7 KB Created: 2020-08-18 21:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7a2d25f18b16a10af1899748f4be665 SHA-1: 1b28dd4f20292a8244cdc6cac17f75c2fda42641 SHA-256: be66102c47376c435616125fe5c92b18e3d5855d8b552208a7ecced52d2766d5
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects through ttraff.cc. This indicates a link farm or redirection tactic. The document body, though heavily obfuscated, contains text related to '8th grade us history workbook answers' and the malicious redirector URL, suggesting a lure to download or access potentially harmful content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=8th+grade+us+history+workbook+answers
    • http://files.kaylacranston.com/uploads/1/3/1/6/131636772/vutowi-zegisa.pdf
    • http://files.prodivame.com/uploads/1/3/2/3/132303151/rubirij.pdf
    • http://vanozij.investingwithheart.com/uploads/1/3/1/3/131380213/jukerab_mopanuleduguz_wukotozivega_jezobin.pdf
    • http://wiloragag.nakhrewakhre.com.au/uploads/1/3/0/7/130740522/fubizozasogog-bogonajitazifu.pdf
    • http://files.onceupon-atime.com/uploads/1/3/1/4/131406592/rexodozokoti_lareponulonewi_wikawevujiw_fujususevapuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/rectangle_all_formula.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/34883658217.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/second_life_map.pdf
    • https://cdn.shopify.com/s/files/1/0453/9786/8712/files/zosexirodasopiji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/jinevipim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/lanaxejifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/54808172581.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/rovobaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/dadifevenasox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/veguwabutenuzom.pdf
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/2566133347.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/modoz.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_off00007a9a.bin
7813d006b5150fa8f7803c7a9f078739169f8ec45dbaec6bef8a10b3788bf4d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 5552 bytes
font_01_sfnt_off00008d8f.bin
7ab10b7a7ec0d67254b7d4b8be88c3684a3c7ca36f26ca27012b5ee6443334ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8F 10624 bytes