Malicious PDF — malware analysis report

Static analysis result for SHA-256 682bbca707cd535c…

MALICIOUS

PDF

38.6 KB Created: 2020-09-10 22:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bb89f6e14ab3efb151ef4eea3d8fb27 SHA-1: 253e8f24947d5c8990c77a968c945cb8e9f2c27d SHA-256: 682bbca707cd535c45d2955013e673f764e7eff59b4ef158a941ae189ed5e7b3
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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.link/wix?keyword=amusement+park+vocabulary+pdf
    • http://files.livingwordcumberland.org/uploads/1/3/1/0/131069781/polekibivajusa-wisivore-pifimuragap-dodibakowu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ddb60a_d9eaf7112a9a4e72ac8a98b69056888b.pdf
    • https://static.usrfiles.com/ugd/81d6a4_ab896353d2984ae2a3bdcde6500a2dd2.pdf
    • https://static.usrfiles.com/ugd/3bcfef_6173ce7a97b545b7a31bcd3917aa1749.pdf
    • https://static.usrfiles.com/ugd/469aea_2d1c63cc5ef845739504e6d7fc7bf795.pdf
    • https://static.usrfiles.com/ugd/a771bd_2a3aed1baa88403eb7a7940809e89969.pdf
    • https://static.usrfiles.com/ugd/8127dd_2a84386b4eae476ebc72dd3ca8b8ad70.pdf
    • https://static.usrfiles.com/ugd/5af86b_ccec2a747542413a85d2557e4259706f.pdf
    • https://static.usrfiles.com/ugd/c4f63d_161bcb449f354aa5a56b937e3112fa01.pdf
    • https://static.usrfiles.com/ugd/22bf55_a2c79cc8a45b46e8a3aee002180dbc8c.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_off00004f8e.bin
173714b687812d91e5aea10161b1c0d90bdcef0329bb384e7dc1380252166f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F8E 5656 bytes
font_01_sfnt_off000062c1.bin
ca1bac188268a0d07391953bebb6e7b33f6459bc755e2ebabe61af04677b834a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C1 13572 bytes

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