Malicious PDF — malware analysis report

Static analysis result for SHA-256 f002a71a5adf5ace…

MALICIOUS

PDF

51.0 KB Created: 2020-08-30 19:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 115125200cf8b0cc74340e8ab8e8196d SHA-1: b3da77d9a0b3f2547eb20139ac37f52da2c6b7fa SHA-256: f002a71a5adf5ace1acb3e6747d90339675b6d045b4619a08c8bd783f32d278d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Dnd character sheet editable' and includes the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely for SEO manipulation or to distribute malicious links. The ML_NYX_PDF_MALICIOUS heuristic strongly suggests malicious intent.

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.cc/wix?keyword=dnd+character+sheet+editable
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/origin_of_carbonate_sedimentary_rocks_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/megaribapuboter.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/77740194225.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/antibiotic_resistance_articles.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/verb_agreement_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/16116930843.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/chaconne_bach_sheet_music_violin.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/bible_art_journaling.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/likilovodesojobel.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9f18cad06e041a6baedb4428c042c3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d93ccf096491447aa97b0d0e689b4e90.pdf
    • https://static.usrfiles.com/ugd/9219f8_0a963003114448c18a1c229d10297a3d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bbc.bin
5d0abcb9242b701384d26c6e67a899bfc2ee079b5437cce82c1834f59734e20d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBC 4844 bytes
font_01_sfnt_off00008c17.bin
365892c2ea45075f0be61435f19f323e3e2a7c213f55f1d5ee6ecaefcc022449
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C17 10876 bytes
font_02_sfnt_off0000b0dd.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DD 4324 bytes