Malicious PDF — malware analysis report

Static analysis result for SHA-256 168d5b579b4df4d3…

MALICIOUS

PDF

35.0 KB Created: 2020-08-06 07:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c48b44437211b001c47ab9a03a62e130 SHA-1: c009465ce087a739bbddb7f33b107e5afca94f26 SHA-256: 168d5b579b4df4d34d26fc1b1c23f6cdc5128e44aa1a9eb1ab1d793d23ddf133
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly indicate 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.ru/pify?keyword=de+cero+a+uno+peter+thiel+pdf+espa%25C3%25B1ol
    • http://files.nevingtonwarmuseum.com/uploads/1/3/2/3/132302872/7215402.pdf
    • http://files.themcdonaldsbook.com/uploads/1/3/1/3/131381910/4f7da3797d63.pdf
    • http://situjivo.emilylsteffen.com/uploads/1/3/0/8/130874197/7371067.pdf
    • http://files.dellavellaremodel.com/uploads/1/3/0/7/130775109/dutokijefibi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/vikalozafipexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6517/2387/files/jupitusotidasowotimesodav.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/79991517879.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/penom.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/sewowulexudutipor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/anisocitosis_y_anisocromia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/kufogisemogazokonajawow.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/pitegemepuvalo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/madea_goes_to_jail_gomovies.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/10169572729.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_off000046e9.bin
29ba6697eea33cf17233a37bdce8aa1b77786f83afdc6bc75b30fed6ed3d6a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E9 5456 bytes
font_01_sfnt_off00005933.bin
9cc5e4919062e921de5c30ba1826a1df120ed4cdc90a407050964716f60a32b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5933 10944 bytes

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