Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b234708729639f7…

MALICIOUS

PDF

41.6 KB Created: 2020-09-09 00:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfc7ab956c12f5259e3f87688a89f43b SHA-1: 1765dd7a7466345af7871437282e49a53972b6c7 SHA-256: 7b234708729639f794cc98fc2daee633a791730b96ccb87b42e935891050864d
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content, but the primary URL redirects to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links suggests an attempt to manipulate search engine results or lure users through deceptive content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=physical+therapy+treatment+for+chiari+malformation
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9202/5249/files/insulated_corrugated_steel_roofing_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/latixegive.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/50274718294.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/siloposidaxuvefiwime.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/95961515045.pdf
    • https://static.usrfiles.com/ugd/95089d_ec94c0666b7f4952b8928a59a4c8ab20.pdf
    • https://static.usrfiles.com/ugd/ab059d_50a9eb41a7304cd4bb458edf5c18da8c.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_7187543c2bdf45298a331cf630de6baa.pdf
    • https://static.usrfiles.com/ugd/b56239_7b3e9069c55948fab695c9cceca2fab1.pdf
    • https://static.usrfiles.com/ugd/73c254_e947f345644a4a23832582b00de0abe6.pdf
    • https://static.usrfiles.com/ugd/b8c837_898e8e7762264120a1679a80c3bdadeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/8456/3110/files/monthly_budget_planner_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/12987804054.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/xumamunizire.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/marriage_not_dating_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/pekavinoxurasavifu.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_off00006598.bin
6ffa5ff6326eba670ce546a87f5dfe665c21ef4e177611b117339bd5dcf07b39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 5360 bytes
font_01_sfnt_off000077b3.bin
1defaf5d963fc9cf856823c4395734f419a34b602239ac803fc9bdb271bbb4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B3 9932 bytes

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