Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cfcf24e9d3956c…

MALICIOUS

PDF

56.1 KB Created: 2020-09-04 00:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a07541cd437cf34bbbaa242407bdea90 SHA-1: 50ffe2feb949615b69323fb9e59b9264beb31624 SHA-256: 08cfcf24e9d3956c05a6c8470a8faf581bd09dbf5ba829861ce49473fea2483f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying it as a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is `https://ttraff.ru/wix?keyword=formacion+del+celoma+intraembrionario`. While many Shopify links are present, one is flagged as a potential lure. The ML classifier strongly indicates maliciousness, supporting the redirector's malicious intent.

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/wix?keyword=formacion+del+celoma+intraembrionario In PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0432/0673/8079/files/lopez_lake_fish_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6728/6180/files/50254445934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/jewosowebami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/6297/7689/files/nawasunope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/wujizagunore.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9af6a01153da4800bb69aa80a8cf6f5b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dd4472_65ee46d5200e45499bde5156df21003e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2043/5112/files/software_project_estimation_document_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/wexepuj.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f4b4e6ad63e74aae84127cfbd282512b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e5a943_da0872908fa244528dd960459a068902.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8c1f3fb7df974c00b7f3a8f0f9b5b514.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007a2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7A2C 6608 bytes
SHA-256: eb8fc824c9cbfaace7cca861f09f87cd088db500f11b5cda623f32c8b28d18dc
font_00_sfnt_off0000694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 5000 bytes
SHA-256: 2b986e7887f7341d04d5c231d763e1f4669e0bece29f17484c9e28df2e348ebd
font_02_sfnt_off00008dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC3 14924 bytes
SHA-256: f0dbdc961b5e712cd36d4fe67eefa86d2e7bab461898392669c9167dfd422565
font_03_sfnt_off0000bc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3F 16096 bytes
SHA-256: 301fb2f14aa1e9a5cf8540ebf40f17e8311eb9ba756e1d76589e408feb703965

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