Malicious PDF — malware analysis report

Static analysis result for SHA-256 65edb5900dc90fe5…

MALICIOUS

PDF

38.0 KB Created: 2020-08-14 23:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87b298a3bd2024d0acc3193f5c04d282 SHA-1: a14eb1d8cfe16cbdf295e3dd79dd23b339303a4f SHA-256: 65edb5900dc90fe50ea882b7a48eed55464063e242c3fb14cef1dff8b3e44b84
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 hosting other PDFs, which is indicative of a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.ru/pify?keyword=food+and+beverage+vector+free', is flagged as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=food+and+beverage+vector+free
    • http://files.artisticvegan.com/uploads/1/3/0/8/130814666/nonanubaziv.pdf
    • http://nusulu.patsendangeredanimals.com/uploads/1/3/0/8/130873927/moluvevasejorit.pdf
    • http://files.jenniferocook.com/uploads/1/3/1/3/131398406/4742100.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/89016626943.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/55947311412.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/xuzuxolawakirobovukubida.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/anita_desai_games_at_twilight.pdf
    • https://cdn.shopify.com/s/files/1/0447/9831/2609/files/30939952405.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/cae_speaking_exam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/rogiwexufodujite.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/gogibet.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/appareil_digestif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/29529322251.pdf
    • https://cdn.shopify.com/s/files/1/0440/5205/4181/files/geological_ages.pdf
    • https://cdn.shopify.com/s/files/1/0447/9251/2678/files/les_collectivits_territoriales_au_maroc.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_off0000584a.bin
bf19065b64aea36c3f8b8c5dcfbec15febf3f9254b56f18dbcb9b601c0da8ea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584A 5136 bytes
font_01_sfnt_off000069e3.bin
eb0e1bc16c2388f85dd3fd239c9efae134de7d93ba0eda0e0ead7aea0393cabe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E3 9800 bytes

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