Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f7710575c36f38…

MALICIOUS

PDF

40.0 KB Created: 2020-08-20 05:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b1554085d5128a50b681a4f8de7fa58e SHA-1: 37bb6a78dd9e61eac023e5cebf891b3339f3d357 SHA-256: 92f7710575c36f38e733697f56a8f5b441e4126f16d053cf905e79def989397a
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=hd+movies+apk+mod In PDF document text
    • http://tuvidu.selectstartpress.com/uploads/1/3/2/3/132303189/5a71c7d.pdfIn PDF document text
    • http://files.edocig.com/uploads/1/3/1/3/131398406/c6cb5c4db2a88c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/tecumseh_lv195ea_motor_repair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/wozijusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/aneurisma_disecante_de_la_aorta_abdominal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/46612429760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/fewagonobenujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/hunger_games_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/10663372385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/letuwolibejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/rumuripidaxabonefekugun.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAE 5060 bytes
SHA-256: a2c3cd9820089ffc78022f22bbd818313872923d3d04001f61e6db4c251caa1d
font_01_sfnt_off00006edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDD 10792 bytes
SHA-256: b5092e5da45985237b63cf5624f968ea8f86f8defbcfb2fe83d21d7a850936ff

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