Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab18a0d4a1eb09fd…

MALICIOUS

PDF

36.9 KB Created: 2020-08-03 18:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54b3f9dab7dd767aef7c45e778f895c1 SHA-1: f718f76f13b92d919593550259f0ef65d9d09a50 SHA-256: ab18a0d4a1eb09fd7cfdf0bf52cd89b9e3f868a95e984dae84cdcb43c17440a2
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'accelerated testing statistical models' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted from this sample.

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=accelerated+testing+statistical+models+test+plans+and+data+analysis+pdf In PDF document text
    • http://sadumixux.arielmeylanart.com/uploads/1/3/1/0/131070331/abab6d6.pdfIn PDF document text
    • http://files.alllifeisyoga.org/uploads/1/3/1/3/131379296/8206359.pdfIn PDF document text
    • http://files.absolutepoolstx.com/uploads/1/3/1/6/131637325/3533975.pdfIn PDF document text
    • http://files.centralhauling.com/uploads/1/3/1/1/131164310/3351715.pdfIn PDF document text
    • http://zubavi.goldorchestra.org/uploads/1/3/0/7/130739625/niwiguwat.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/1/0434/5639/7474/files/sales_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/xopaxiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/bopewig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/xesopovisapasuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/45470658133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6988/8929/files/django_timezone_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/53778516619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/11495043187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/83452303593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2698/0770/files/fegojufudibewemus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/8327390269.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 8

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_off00005059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5059 5564 bytes
SHA-256: fd49856a8eb2b2d882977341c1180d94b1f420a591a336f32897cc2d981775cd
font_01_sfnt_off0000633e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633E 10264 bytes
SHA-256: b45eb3dcf98c8bab4c402df951bcc545966ae9b44d28a1c678c56b93f9793a56

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