Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c515a8cf8844f6…

MALICIOUS

PDF

51.9 KB Created: 2020-08-15 21:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a94b8bcab52571cff788ed6bea5dea9 SHA-1: f3f8a65b1579cbfbac1c0bee9b4206ff709c5147 SHA-256: 71c515a8cf8844f66ed87eb44bc9f1058d414eb15ddc492a4dbcffb61c33b9be
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to vaccine side effects, aiming to trick users into clicking the malicious link. The presence of multiple external PDF links, some pointing to benign Shopify domains and others to unknown domains, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

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=vacuna%20triple%20viral%20efectos%20adversos%20pdf In PDF document text
    • http://files.writersrendezvous.net/uploads/1/3/0/8/130874213/tasadetolizob.pdfIn PDF document text
    • http://vasazosu.agbio-inc.com/uploads/1/3/1/3/131384169/zuxitop-suzagokuxopudab-kipunifi.pdfIn PDF document text
    • http://rusanewi.nfiniteimagery.com/uploads/1/3/1/4/131407089/fukininoj.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/1/0435/6128/7839/files/goldman_fristoe_test_of_articulation_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/abbyy_transformer_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/pesipisokolaligebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/sobosabumadimujil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/ap_art_concentration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/47853874595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0826/1276/files/advantages_and_disadvantages_of_blue_eyes_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/safus.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 2

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_off00008adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADB 5172 bytes
SHA-256: d665836e22700100b79713a4f76f7fd5df301ebf7b1a4f5ad13f524d40922927
font_01_sfnt_off00009c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C87 11288 bytes
SHA-256: 90a9d1b6b919576a7d6a386564ac44119ac884d09eccd948b1902fae0eaee491

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