Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb7ff34b1ba2f72…

MALICIOUS

PDF

72.1 KB Created: 2020-08-04 00:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7bc5137c883157b1c4b39b099ad78f9 SHA-1: c06f8ae95d876dec23aff83198d3c9cef5af9a2c SHA-256: 5bb7ff34b1ba2f723bb54d864c5cbcfe4cea81ba6ebb6a7455353d774b050dde
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One prominent link directs to `ttraff.com`, identified as malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The embedded links likely serve to distribute further malicious content or lead users to phishing sites.

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/wb?keyword=gustave%20le%20bon%20psychologie%20des%20foules%20pdf
    • http://files.empowerptandwellness.com/uploads/1/3/0/8/130874169/nuvin_bakobalowelex.pdf
    • http://files.letterstoimani.org/uploads/1/3/1/4/131437711/finup_retutanidof_nunabolewave_guzexuri.pdf
    • http://files.haralsoncountyhistory.com/uploads/1/3/2/3/132302913/4438840.pdf
    • http://files.epeecow.com/uploads/1/3/1/8/131856186/1228364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/ragunapalevijoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/mumaporidanowubodufese.pdf
    • https://cdn.shopify.com/s/files/1/0444/3645/5591/files/resto_shaman_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1996/files/paniwirexemugukotis.pdf
    • https://cdn.shopify.com/s/files/1/0436/6116/4697/files/rugibajekididirasit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/tevivog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/litumotopupogedifowuxisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7786/0516/files/zatuxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/negemem.pdf
    • https://cdn.shopify.com/s/files/1/0428/8747/9455/files/66802027600.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/87638733783.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_off0000d7ce.bin
4c8fd1061f2a4f3ce7d3ec106b22cb02d0aced4da355888a7b9475ed92ebe5af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CE 5656 bytes
font_01_sfnt_off0000eb1c.bin
a162dd4c09b89eb725f4620e98b9c2459195924622da07dfc4f72f2d8e50f0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 12424 bytes

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