Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b99378d1e22333…

MALICIOUS

PDF

40.2 KB Created: 2020-08-22 02:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6be8f67b4f8f1e4eb59e8aa259ef8e66 SHA-1: 1d79dd611d815e6e8aeff78e92574cbd73a1f0dd SHA-256: 09b99378d1e22333ff7ca49b7c53f7da49b43df9a69daa2e33c5e443e7685162
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and a reference to 'wkhtmltopdf', suggesting it was generated programmatically. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware delivery.

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.ru/pify?keyword=sembaruthi+sembaruthi+cut+song In PDF document text
    • http://files.marrsrail.org/uploads/1/3/1/8/131871852/loritoribupugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/lipofuscinosis_neuronal_ceroidea.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3139/5493/files/22137853566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wiwatubaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/47063586665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/toro_timecutter_z5000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/78784714613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/50437647627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8639/7849/files/cellular_respiration_summary_table_review_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/60081096896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/82218846887.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4593 5424 bytes
SHA-256: 9e9cab5f2017c3454b14a515154b288ed4e7f79414369f958f6b55b2ebfe6cd9
font_01_sfnt_off000057d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D5 10308 bytes
SHA-256: 7f22cfdba62a101fb89e13a8d86671386fef5c3cdd699c1db538dbe3a05a959a
font_02_sfnt_off00007441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 9316 bytes
SHA-256: 8b427e519ce725abe78c7787d6780896eb450740fb1ee4ea7707cf582b61e5ea

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