Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efab186d882bff8…

MALICIOUS

PDF

39.3 KB Created: 2020-08-30 21:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6129264d230247a8ceff1e01b833c2e1 SHA-1: 2261164477ebb1beadbbac1ee6925b5f4456142e SHA-256: 0efab186d882bff815c6209eacf3f3a01261efe14e1d10f20df24ccd890775e9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Aion online classes', suggesting a lure. The presence of numerous Shopify links, including one to 'benjamin_button_book.pdf', indicates a potential link farm or content stuffing technique to obscure the malicious redirector.

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=aion+online+classes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/benjamin_button_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/tanumibexon.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/fibaves.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/kazozigepikilarerelir.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0540/files/vejefizaputa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/lefirujifepidupebajataxe.pdf
    • https://cdn.shopify.com/s/files/1/0448/9504/3751/files/16869716373.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/28744766549.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/wujudemejov.pdf
    • https://cdn.shopify.com/s/files/1/0428/5356/4583/files/99108556011.pdf
    • https://cdn.shopify.com/s/files/1/0436/7283/0105/files/business_environment_project.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/92940560562.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_off00005e2b.bin
e19a3b7e1cce107912d46ce1b1d61d3615c3bbc2f18765a557f652385d0919d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2B 4688 bytes
font_01_sfnt_off00006e20.bin
a1998d40bbff9858fb590c50ec9a380359ef347b625bb88b98f1421946548e16
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 10216 bytes