Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5079bd02f2d0f8…

MALICIOUS

PDF

43.2 KB Created: 2020-08-01 10:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2843714aeb8212fd69aa8bacbb611dac SHA-1: 619e45bbfa98b0932d52346486260f9a7af69995 SHA-256: 1f5079bd02f2d0f844174f3c3e5a1a4055d7f14c9ed4b8e7d2bd1ad4c7d68e31
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/pify?keyword=formatting+in+discord In PDF document text
    • http://files.goreybypass.com/uploads/1/3/0/7/130740442/bikufuni.pdfIn PDF document text
    • http://files.mathbag.com/uploads/1/3/1/6/131607131/3b3309d91e61.pdfIn PDF document text
    • http://files.alexandrabischoff.com/uploads/1/3/0/8/130814605/557749.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/1/0435/9385/9240/files/73616582842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/5020582729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/66052900112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/40202487578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1791/9912/files/79859285476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7845/8275/files/gifow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/87398996097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/nigonedugixuzukifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/miwesamuragexurelinosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/13993336353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/66447206136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/80807060863.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_off00006a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3C 5180 bytes
SHA-256: 50ce22b7218920490bfe904cafcdfaf5295222b711da05201882fbe0f8527207
font_01_sfnt_off00007bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC8 10576 bytes
SHA-256: 188b1e20c43b7096a3cfe76f09db4b4fa715655785ba9ba2e9d361e528a89d67

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