Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bab983721b5a030…

MALICIOUS

PDF

40.8 KB Created: 2020-08-20 02:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5859ea055aed563f3b8073a015f491b7 SHA-1: b7d78fd78e081c6dacd5e643a9914854f9212945 SHA-256: 8bab983721b5a030226dfa2f4c5473e55d3d64c92df223d4dcdfe4f1ff862445
194 Risk Score

Malware Insights

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

The PDF contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of outbound links, many hosted on cdn.shopify.com, likely to obscure the malicious destination. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector heuristic, reinforcing the attack pattern.

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/pify?keyword=substitution+and+elimination+worksheet In PDF document text
    • http://files.springsteched.net/uploads/1/3/1/6/131637553/884f48437fea2.pdfIn PDF document text
    • http://files.dubayhomeinspections.com/uploads/1/3/1/6/131606331/9956858.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/1/0434/1936/9639/files/famous_english_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/88177820114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/bosizikizitinigapan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/19973916280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/team_extreme_minecraft_launcher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/mobojofat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/bihar_tet_computer_science_syllabus_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1170/files/29889529436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/48022324711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5795/8299/files/ccnp_labs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/fovizagogekelejiredi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/dota_2_turbo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8146/6005/files/51359713760.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 7

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_off00005e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E81 5464 bytes
SHA-256: 119fe24a17ffe45d596ce7ccf2dac9fc28b4f1b9b682e68f62fcd3c847424c7d
font_01_sfnt_off000070ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EF 11356 bytes
SHA-256: d08799e9f32f6c05974f97cdb120a0c30964e280e899250d779d0b380a594e33

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