Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1e156c002cf049…

MALICIOUS

PDF

32.3 KB Created: 2020-08-30 18:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 353aebfe8d258f92a3c646b835409f1e SHA-1: f1884143d1041991a010e82ebce36b4137d401f3 SHA-256: 0e1e156c002cf04965b1fb34c2e7721406ea5864962ee3b41454e7fca4b20d93
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is 'assembly instructions' and includes the malicious URL. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the link farm suggest an attempt to drive traffic to malicious infrastructure.

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=artin+race+track+assembly+instructions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0adedf_ccba9eac629d4f4798b1024a7d0191fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5800377252648beb30c8bc56b1e50e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9f579784622479db9af6a80c358af22.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/75859956709.pdf
    • https://static.usrfiles.com/ugd/eda9ba_bab8c6e2f2f74adba4971b59ae954248.pdf
    • https://static.usrfiles.com/ugd/cac9e4_fd8f6fd49f9d4052990789d38a87d14d.pdf
    • https://static.usrfiles.com/ugd/e5a943_b0c4c1bee97d4e29bc2b5cd5a4b65fb2.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/tofuvewaloxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2102/files/58469819514.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_off0000433c.bin
d50d3d3f0ed4e9c9c85c008d368cc2240576f0a11113b595d21dd31ff401f939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x433C 5240 bytes
font_01_sfnt_off000054ed.bin
fe20689c5762bd8c5ce98dc486a74106e9c4dc11aaa5affa3c90999ae5993ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54ED 9316 bytes

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