Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7810b69e57b3a1a…

MALICIOUS

PDF

39.2 KB Created: 2020-08-16 21:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: badb542ccacb8205fad1c1bbb0578d31 SHA-1: 874fab99d031ffe875e9d8b8d8962a20ed443997 SHA-256: a7810b69e57b3a1ad23bdf6850131413f64790002a3d8a7481ac6ba3a4911786
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a malicious redirector link disguised as a ski weather report. The ML classifier strongly indicates maliciousness, and the PDF structure includes a large number of external links, many hosted on Shopify, likely for SEO manipulation to obscure the malicious redirector. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

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=cervinia+ski+weather+report In PDF document text
    • http://files.oshamaizeherbal.com/uploads/1/3/2/7/132710797/rupikilujaden.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/1/0428/2505/6412/files/90816267194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/kusixigozarumanavagolevip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/bowab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/96017732321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/alice_in_wonderland_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/gedar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6776/7970/files/36677053379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/76828230393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/median_of_three.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/human_relations_theory_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/dakexesilawaruxonowale.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A12 4996 bytes
SHA-256: fa28d1a15f6967bbf20a997fbcb7fddbd9b1155fedaee0fb16ebc006acf329fe
font_01_sfnt_off00006b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B19 11376 bytes
SHA-256: bfa44205409712f5699db528e682dbad4592f830d5f8241e7da2a31574cc390e

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