Malicious PDF — malware analysis report

Static analysis result for SHA-256 1730adad1c3447cb…

MALICIOUS

PDF

42.6 KB Created: 2020-09-01 07:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb828dae3d281d772890a23a9528eb4a SHA-1: b10d47bb177dbe2b175120084f6f578da216753d SHA-256: 1730adad1c3447cb1a074cb9d2f5481c287e616ebc92161872965b32aa512dbb
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to educational worksheets and the malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of embedded URLs points to 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.com/wix?keyword=addition+and+subtraction+of+radicals+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/lesomowusewalozopasitif.pdf
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/32181919800.pdf
    • https://cdn.shopify.com/s/files/1/0458/1693/8662/files/armorseal_1000_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/libolofep.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/lutinuxe.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fe25d6526324c378ceb3e72ea834f89.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6aaf312e7c8418087497f06d67d87a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e824070f6e1745b1bfb4cc3cb22c099a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0a240b999dd4962a9aaa97d70bbd310.pdf
    • https://static.usrfiles.com/ugd/902d29_7b49eb8d90f74a13aeb498b762dcefaa.pdf
    • https://static.usrfiles.com/ugd/d17951_e176cf643e8443b5a7e271f25eeddd73.pdf
    • https://static.usrfiles.com/ugd/0511f5_1af2082cffba45c4a8f747ac9905e5c0.pdf
    • https://static.usrfiles.com/ugd/2c8d66_6eb6ac0eb9f4499098c4a4d4f3fbba7a.pdf
    • https://static.usrfiles.com/ugd/e73fea_debe9c5fee364aa2ba6d5ea87cffc068.pdf
    • https://static.usrfiles.com/ugd/b50c55_7206673a48d4470a8fda859da4f8f3e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_133699766a68417d99bdd95685438f55.pdf
    • https://static.usrfiles.com/ugd/6df952_0a791385f16e4d788b94abb2f849eb75.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_off0000651b.bin
e37218dcb966d828e362f3a20aef3a543e4788220af78a23aec584be4a99eb05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 5392 bytes
font_01_sfnt_off0000777f.bin
335addb95de69bc7dbeb5242ecf1dbe8b7553bfb1bf983f632b1809c4ad8c607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 11536 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.