Malicious PDF — malware analysis report

Static analysis result for SHA-256 731af8fc53fc2183…

MALICIOUS

PDF

63.3 KB Created: 2020-09-08 00:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e077e1fa74c462d72f1e56e3b52738a2 SHA-1: 3d665c03f10d871ee97391a09d45e5b1906beb3c SHA-256: 731af8fc53fc2183cf41a04e3e6694d4db7844d6f4f68a535c7aafb77fdea7ff
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.link/wix?keyword=tourism+jaipur+city+guide', is flagged as a malicious redirector. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards an attempt to lure the user to a malicious site.

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=tourism+jaipur+city+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/formule_du_barycentre_de_3_points.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3015/files/chalk_style_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/miss_universe_1969_question_and_answer.pdf
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/lefenamonuvom.pdf
    • https://cdn.shopify.com/s/files/1/0460/5643/9963/files/obus_forme_ergonomic_lowback_backrest_support.pdf
    • https://static.usrfiles.com/ugd/5a1791_4a4619ae396445d5a60eab8bcb91735b.pdf
    • https://static.usrfiles.com/ugd/cec570_305f58fadb904f599805ce9fb69e19e0.pdf
    • https://static.usrfiles.com/ugd/11baf9_9c2316cfe72149149b1d14cc05aee643.pdf
    • https://cdn.shopify.com/s/files/1/0440/3780/0086/files/doferutemegimepovomixogij.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/28887263091.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/vajupanalizizesor.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/62083970289.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/berthold_script_medium_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2589/files/angular_4_ng_template_outlet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/47953849124.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_off0000bad9.bin
c59ed36587f618fce3a100135d5d3f5fa20cafdee5bba2db7abd4edf1e7d75fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD9 5488 bytes
font_01_sfnt_off0000cd74.bin
fed7f4a99574c3afdc47f86b141f91c3beedff77bbe25e61c74bd958f6bee2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 10192 bytes

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