Malicious PDF — malware analysis report

Static analysis result for SHA-256 1755da671eefddf4…

MALICIOUS

PDF

46.1 KB Created: 2020-08-30 17:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff80cc71dd84bd960501b71802157da3 SHA-1: 604f23ca2fe22c46adf3cca63a7f4532ba0a7ec6 SHA-256: 1755da671eefddf4b89e0197fa94778acca3a612f7ec3428c0e7cc4d702dcfb6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document's primary purpose is to drive traffic to malicious sites, likely as part of a phishing or content-luring campaign.

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=new+vegas+fov+slider
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/5ecadc_7de760a0fc2a480aa5a5e581609a5451.pdf
    • https://static.usrfiles.com/ugd/b8c837_affe1b30498c467f87c4f69187cf9570.pdf
    • https://static.usrfiles.com/ugd/238140_f8613720f5ba4ebba58bd644b910e2ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0fd589c49c4cc1b8f514fae60e0fe6.pdf
    • https://static.usrfiles.com/ugd/a1fb72_843398fda0fc4f228ab695361fd4b289.pdf
    • https://static.usrfiles.com/ugd/4826f5_3183fefe70c943dbb706fc44e3012772.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd080db55ec54f028f44cb67d5a5092d.pdf
    • https://static.usrfiles.com/ugd/a91264_ac887dec1a7b467db043f9d29cc67e79.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_b02e52e4605f47aea10fcd0ca434650c.pdf
    • https://static.usrfiles.com/ugd/4479ed_cd5f021217354db0af3eb6602b73717d.pdf
    • https://static.usrfiles.com/ugd/64d889_011918964dde48acac5dc539541d8318.pdf
    • https://static.usrfiles.com/ugd/6d59ab_0f48a6eb023c4253a8c30f5ef9d13e56.pdf
    • https://static.usrfiles.com/ugd/e4ff69_c369e1c362394c938a413a90a87eaebd.pdf
    • https://static.usrfiles.com/ugd/0d089b_0ee4c42183fe4ed6bece16e3b3a752d9.pdf
    • https://static.usrfiles.com/ugd/15cd4d_f0e37723acb94f3caa0da89b3834149a.pdf
    • https://static.usrfiles.com/ugd/b8c837_321c96c2487a487cb589d4bec3c8d43f.pdf
    • https://static.usrfiles.com/ugd/b8c837_16479d6eafdc437fa583bb2210179fda.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb6fca7f18444a6a859001c0166b6698.pdf
    • https://static.usrfiles.com/ugd/b8c837_255a84215a284ca88d45dcb08a210a2e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ad.bin
6392d0fabd2709a0370f574a1d0cecfc83a15fa65b622fcca5eedf253bde4f30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 4796 bytes
font_01_sfnt_off00007627.bin
5cb731fe22ba86579596adad49baea9586f17445850a55eb0ff661161ca16f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7627 12080 bytes
font_02_sfnt_off00009d75.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D75 4324 bytes

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