Malicious PDF — malware analysis report

Static analysis result for SHA-256 81340a7e069dc26f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-12 23:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9c148e461684c02a51f6d6e2102903e SHA-1: 72ab28e8922599479133efe2720bd24c60c174a9 SHA-256: 81340a7e069dc26f2b0435efca1ee67d3f97d040964a20cdc73032a949e0ea96
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for hosting malicious content. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics, suggesting a phishing or scam attempt disguised as a free download. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=hypothyroidism+diagnosis+and+treatment+pdf In PDF document text
    • http://files.goldlawcolorado.com/uploads/1/3/1/0/131071114/saxov.pdfIn PDF document text
    • http://files.pomphreyconsulting.com/uploads/1/3/0/8/130814588/7174674.pdfIn PDF document text
    • http://xitit.mercedesclubindia.com/uploads/1/3/0/9/130969060/12c554e19a6.pdfIn PDF document text
    • http://lolum.eb-lcm.com/uploads/1/3/2/6/132682924/givejo-gudajitigemu-zoworasunamago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/90968158356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/kugotakuzigejoputivur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/asciidoctor_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/kamewimofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/saduwasanowubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/biserial_correlation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/wuxujirokozevasofuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/sajagogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/bubble_answer_sheet_1_40.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/jetadizexawokutewofomuxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB0 5276 bytes
SHA-256: c6403910cf91ff15a5fb3e28a3f717e87c9aff57705e940324143a5d99641512
font_01_sfnt_off00007c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C78 9964 bytes
SHA-256: 66298d673a63d9ebc7dc58c981ac6e1963f63cac8b9176fb4daf2402b9fb9a05
font_02_sfnt_off00009e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E80 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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