Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4bb79f0a9af73b…

MALICIOUS

PDF

55.1 KB Created: 2020-08-11 22:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 943eb94fc0f9221774b3d9a99f86df5e SHA-1: d7a186dd2eb89a6c2abb2f1f7d0c30104779b75c SHA-256: 6e4bb79f0a9af73ba66006f986b51a6417bf941575a669d783e75c36da2efff3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains text suggesting a lure for a "commercial building maintenance checklist pdf". The ML classifier strongly indicates maliciousness, and the presence of numerous external links points towards a phishing or scam attempt, likely using a spearphishing attachment vector.

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=commercial+building+maintenance+checklist+pdf In PDF document text
    • http://lojupo.costamedicalmarijuana.com/uploads/1/3/1/0/131070767/574d0943.pdfIn PDF document text
    • http://files.arvinminer.com/uploads/1/3/0/7/130738841/mexavurogib.pdfIn PDF document text
    • http://files.clickitandcartit.com/uploads/1/3/0/7/130738903/xujupiwe-taripopajevimug-mabelogiziv.pdfIn PDF document text
    • http://files.childrenscauseoc.org/uploads/1/3/0/8/130813985/8839112.pdfIn PDF document text
    • http://files.jadewestbrook.com/uploads/1/3/1/4/131438419/b3ea8a610.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/1/0433/0687/7080/files/fenajowogotuxukat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/sivixetikurilad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/nagekabilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/19769912612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/39383558959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/51600971665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/kolivukemezodejomuzasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0570/5374/files/51025161108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/xuzemaginikixelotom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0704/7840/files/mixurutibiwuwudadixopexop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/chalean_extreme_meal_plan.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_off00009570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9570 5680 bytes
SHA-256: 3e71bf1e61c35e756274aed6f36250f34bcdb3da346b7e83094aa03da5396929
font_01_sfnt_off0000a87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA87D 11588 bytes
SHA-256: 34a444fa764d83b429fff1f618ec5d7d7f09290a4cae4217979a27a0c3170b41

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