Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2c18ec022856c9…

MALICIOUS

PDF

40.7 KB Created: 2020-08-26 17:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e031c14d36b93f7318c676bb1f022a23 SHA-1: 08ad7594e4180c1cf334d9c67ca21b533a5c52b8 SHA-256: 1d2c18ec022856c936581e5600b7241893a9e85d9241d518820546c778d35d74
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect. This suggests the document is designed to trick users into visiting a malicious site, likely for credential harvesting or malware delivery.

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=lying+by+omission+quotes In PDF document text
    • http://kodafoful.elportalschoolptg.com/uploads/1/3/1/6/131606666/3302135.pdfIn PDF document text
    • http://files.specialedu4parents.com/uploads/1/3/0/7/130739654/bodovadused_naraxizifidur.pdfIn PDF document text
    • http://files.healyshandyhouseholdhints.com/uploads/1/3/1/3/131398176/2136e6a3.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/1/0438/4414/1218/files/bacteremia_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/vewojawaxupizet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6067/2165/files/unholy_dk_rotation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/statistical_reinforcement_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4136/9761/files/5284282269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/rutilimulipijudedutak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3902/3253/files/82004136792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1223/4139/files/rivevaludavurawovatuwoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1877/8781/files/bolted_connection_calculation_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/69644685945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/0302/7099/files/algorithme_informatique_debutant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9684/9051/files/vejubowulafokidopasaxomix.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_off00006391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6391 4976 bytes
SHA-256: e59b01ee9f773c700fca48c052e90d5207c784ca73f6a84f385cdc702cbf308c
font_01_sfnt_off00007473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 9924 bytes
SHA-256: 66d7f454789b104cff2879d5df109063c0ff848b535fdbfcd836b56ba8239079

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