Malicious PDF — malware analysis report

Static analysis result for SHA-256 705ed480238848f6…

MALICIOUS

PDF

114.6 KB Created: 2020-08-31 12:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02579cfb6b221e549d099efd2347707b SHA-1: 7e6d0e9b6d760c9c022f6d431e542fa273705b10 SHA-256: 705ed480238848f6b1772757f3c957f75292d77bcdc71288bc428d15691ee816
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to legal text. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content broadly.

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=el+juicio+de+amparo+ignacio+burgoa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e7163694d3c2420f8f09a255e1cdfa80.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f4fad99df694fcabbcc53da8f491fd4.pdf
    • https://static.usrfiles.com/ugd/a01749_47ac8a173c104f23ba7404e3315e2536.pdf
    • https://static.usrfiles.com/ugd/b8c837_82b649a0d6ba4e9b85b9f29ff033aa9c.pdf
    • https://static.usrfiles.com/ugd/aa14a9_316dfcac75d0430aa790931aec4eb574.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_fd7989015f03401082b6ea67036c59f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_083492c2e89a4c3b96d5e0ab96b34c90.pdf
    • https://static.usrfiles.com/ugd/7603ae_83a32b1168bb47c2ad1dbbb3a83764d3.pdf
    • https://static.usrfiles.com/ugd/c3548c_e761ef4c4fa949ec94e0e0f57cddf463.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7b2be44753840888bbca63315dc089b.pdf
    • https://static.usrfiles.com/ugd/ef7b09_3b1dcfd896bf48279362e6ae630f2ee4.pdf
    • https://static.usrfiles.com/ugd/73f3b0_8e53e3aef71c41a98d36fef9e0ae3043.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_3302c10227d146be899fefdb2267d469.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_off0001847c.bin
d3a16c61d23616e5d3a1085697e3f8a2a42350f32723142a0eb5075ccd842ab3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1847C 5388 bytes
font_01_sfnt_off000196b3.bin
878a2c46fee534ee4a299bfbc22b1baed2b2f62cff76ccf1dd39261e73255c33
pdf-font-stream PDF embedded font (sfnt) at offset 0x196B3 12140 bytes