Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9aa40fe11bdd6c7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-13 14:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fdd2e25fc156515cf0224d2339bf1848 SHA-1: 7113fdf07b0c29a4cb4c50c57cf17c475e3846e5 SHA-256: a9aa40fe11bdd6c7214054161fbefeddc6eabcbd4d9baa4b5696b6a3bd0c560b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the same URL, suggesting a lure to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=importance%20of%20cultural%20communication%20pdf In PDF document text
    • http://tatipe.woolacombesurflifesavingclub.org/uploads/1/3/1/0/131070420/nogoteberodob.pdfIn PDF document text
    • http://zidumibom.ausablebrewing.com/uploads/1/3/2/6/132695569/c20dd7be.pdfIn PDF document text
    • http://xajebima.funom.org/uploads/1/3/1/4/131406082/56a0d58f.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/1/0429/3672/9766/files/podalugusujem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/98722789626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6650/7943/files/oscilloscope_specifications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1141/4943/files/vesiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2599/5688/files/diary_rewards_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/ropaxazufinemoxumakok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/3811228189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/vuvidivelamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/8323027269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/how_to_reinstall_graphics_drivers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/epidemiologia_de_la_diabetes_en_mexico_2020.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_off00006003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 5060 bytes
SHA-256: c289168323ce7f6452ef35339533650752304c1272ed987ddd2c222a4581d24a
font_01_sfnt_off00007111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 9880 bytes
SHA-256: 786b1b7e90e9a0478f16c30e31ea0b084e9f4e716cd0717357547a9c0d711959

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