Malicious PDF — malware analysis report

Static analysis result for SHA-256 7041fa82a1955a70…

MALICIOUS

PDF

47.4 KB Created: 2020-08-31 02:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7597c7b1f8da84d4a62a1832860bde35 SHA-1: 4ecd44e646294a218626a32a6a4977b763e2f80a SHA-256: 7041fa82a1955a70407247c46e0424a1197e9f71d8f02e8f8cd4790620e452a5
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded links and the malicious redirector strongly indicate a phishing or redirection attack vector.

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.ru/wix?keyword=%25C3%25A9valuation+technologie+6%25C3%25A8me+fonction+d%2527+usage
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/88519635527.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/78783056903.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/bmat_s2_assumed_knowledge_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/images_of_nations_and_international_public_relations.pdf
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/walter_de_la_mare_poems.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_53088dccb4c74202bd6a17bc8cf0bde6.pdf
    • https://static.usrfiles.com/ugd/6f58fb_6ab481a6207547569c34f434862bbf50.pdf
    • https://static.usrfiles.com/ugd/8b2c09_81cb4e908da64d72b2b2dcee049daf3f.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/9th_class_ncert_maths_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39843759369.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/89623664384.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/7303461173.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_off00007432.bin
ba22d4be961d0cbebce72c216a0cfc164ecf18c1457deeaf5529872ffd948ed0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7432 5708 bytes
font_01_sfnt_off00008744.bin
14d60cbec916d90f76fe679521c5e85e3eba39dd64f934af7ef1769479c61703
pdf-font-stream PDF embedded font (sfnt) at offset 0x8744 12636 bytes