Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa906fe7e226292…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 18:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3a258c01f6ad09ddae994c06177bf454 SHA-1: 6b62f48a7c5ba7edeaf7e823d77f64cbe9b50ecd SHA-256: 1fa906fe7e226292e36d3c8738a0fa77f4ae313aebcd62b95d73fdbd23e3949c
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=lathe+machine+turning+operation+pdf In PDF document text
    • http://files.st-phil.org/uploads/1/3/1/3/131380063/3276393.pdfIn PDF document text
    • http://files.cameronhighlandshomestay.com/uploads/1/3/0/8/130874354/furomabeligesodura.pdfIn PDF document text
    • http://files.trouthide.com/uploads/1/3/0/7/130775033/rupefekitom.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/1/0430/8077/7882/files/guzowuwaperesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0830/9923/files/vimiguwameritasoxixuviraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/50565342344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5081520916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/92926732559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/22866071728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zututekafufefosapebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3539/3191/files/dart_language_flutter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/tasebevesovorawuv.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_off000072f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 5300 bytes
SHA-256: 8f76e358dfdf1552be33ff47cf5e37d3d06a2fb2ad7e7c1f13471bf57e7f22b3
font_01_sfnt_off000084d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 10148 bytes
SHA-256: 0e669aacc145e992ceac634cfec735b26cd466ec570e8c3a5f88ca75e6dbed9a

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