Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e882b1bd36732b…

MALICIOUS

PDF

41.5 KB Created: 2020-09-06 23:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a1f57bfbebe9dab1ae5bc408f8b5b63 SHA-1: 1a2d2c947438db82d1885795020946b316904a13 SHA-256: 70e882b1bd36732b2b5bb5f55cc58f2163b24d7c5f5837cb961e414c0d0cef5f
154 Risk Score

Malware Insights

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

This PDF file contains a link farm and a malicious redirector URL, indicating an attempt to lead users to harmful content. The presence of numerous links, many pointing to benign Shopify URLs, suggests a tactic to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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.link/wix?keyword=live+channels+app+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/download_pdf_agama_islam_kelas_11.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/43406600254.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/nulejaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/3653/1095/files/multiples_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6601/files/introduction_to_anthropology_psychology_and_sociology_grade_11_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6892/3799/files/zatadufipezi.pdf
    • https://static.usrfiles.com/ugd/610d21_5913bc1e73014543a7c48223bdc8eea4.pdf
    • https://static.usrfiles.com/ugd/89c6ad_7dbb4b901b5a47b8b08d6188852cb770.pdf
    • https://static.usrfiles.com/ugd/5a1791_50cbb8f0792a4abf8943f16e3e229d7f.pdf
    • https://static.usrfiles.com/ugd/7f614e_fe062f2d649841078a7ae6905e518b07.pdf
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/rizufukomuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/duwudibolexabubodip.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/dorusizebatu.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_off0000675a.bin
3f516f33811050759c5212e81f90257134cb09f928445617bbaa59196c1a89d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 5160 bytes
font_01_sfnt_off000078eb.bin
3eb2804b4536c5c12e3d9864f385d463ea90b839fdfe060c91322b08a1f72d85
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EB 9600 bytes