Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af755c091830e09…

MALICIOUS

PDF

44.7 KB Created: 2020-09-07 07:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b23b200738403886c2e76a70ce004e7a SHA-1: 30471d16979276b72be79746f57e0b79800f695e SHA-256: 7af755c091830e096628391ade68961df39e52fff2b2263b67ee77743b1c06b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm and a primary malicious redirector URL, suggesting a phishing or scam attempt. The embedded URL https://ttraff.me/wix?keyword=electron+energy+and+light+answer+key+pdf is designed to lead users to further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous links points to an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=electron+energy+and+light+answer+key+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b7ed05_2eff538701aa403eb16295b9e22e8e27.pdf
    • https://static.usrfiles.com/ugd/866690_d10f168102d9452c830a86435094144f.pdf
    • https://static.usrfiles.com/ugd/7ff653_282f802f7a2447c18e1086acdbfe5655.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2e8a6626b624cf49423f61f2681a872.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7db4e5df721457397b4970c38ae0436.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/ratizulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/76749184329.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5589/files/pan_acknowledgement_slip.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/siwavamewixi.pdf
    • https://static.usrfiles.com/ugd/a467d2_c8b504aab2d044f58e72bb1014f6c2f4.pdf
    • https://static.usrfiles.com/ugd/d2759c_3dfb3a78bc174a2e9b2158ba7c288b0e.pdf
    • https://static.usrfiles.com/ugd/269bb8_78e51f10d7174e9f9cc4dab54224eb95.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/elaborative_rehearsal_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/another_one_bites_the_dust_bass_sheet_music.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c8.bin
498f4c6c69cc8ab9bb76017fffcc57140d914a0b7fe1aefbd0934626e18c9282
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 5632 bytes
font_01_sfnt_off0000840c.bin
bd9ffeefa81a3a374c7098acf3824a28be443609b49014dd94b93c6791e2f50e
pdf-font-stream PDF embedded font (sfnt) at offset 0x840C 9972 bytes