Malicious PDF — malware analysis report

Static analysis result for SHA-256 84854d5522ce0dbe…

MALICIOUS

PDF

45.2 KB Created: 2020-09-06 06:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2650dbebb6858b1875b6526ba04b6454 SHA-1: 011c5328d3846acf7d8990b172ea6ac608de7213 SHA-256: 84854d5522ce0dbe64873ce9541a515618f4bc63545a78d5427e57fd8b9e156d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent link directs to a known malicious redirector, indicating a potential phishing or malware distribution scheme. The ML classifier also strongly flagged this PDF as malicious.

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=benchmarking+in+total+quality+management+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/eb6c48_8e53ee4ca3214d8e893618bb39a14f2f.pdf
    • https://static.usrfiles.com/ugd/911c12_f213845521114b69a7b0c4f1d45e5fdb.pdf
    • https://static.usrfiles.com/ugd/b1dabf_9e73fc5d98a54073bcb416e18f7b2bd2.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/sudaxapodilekuguteb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdf
    • https://static.usrfiles.com/ugd/9c43ec_439209278dd944648a9581f3c9b455a6.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_0d6c56afa4c24363bea7855e7cf2f273.pdf
    • https://static.usrfiles.com/ugd/4117a9_bb444e243f0d499ba0be7632bc4b4e41.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_6a20baf61c7744ca8604c3b09473592b.pdf
    • https://static.usrfiles.com/ugd/16a96a_f44b238d6c0c4bfd90c0315ad1932dcb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/can_t_chrome_from_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/nwa_appetite_for_destruction_full_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/9716845463.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_off00006da7.bin
d206a9e7983ddfaf7e72e130535c0eae15da809c1dcb8752063ac476f0383e7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 5732 bytes
font_01_sfnt_off00008107.bin
59ffc0d55679c23a78ad5c98204eb4152dfd3eced6e1973ba4cc95e09444c1bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8107 12156 bytes