Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1c3de4c3d54f40…

MALICIOUS

PDF

101.5 KB Created: 2020-07-31 06:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26ee3adbb92b21a473121755ac7531b1 SHA-1: 32a6b78dd469e3fbf902d81793fb4af72f7c6be6 SHA-256: 4c1c3de4c3d54f40573879865a0fe5c36270581c837fc21e84b903ec0b5197f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a critical heuristic identifying a link to a known malicious redirector. The document body appears to be heavily obfuscated or corrupted, but the presence of the redirector URL strongly suggests a phishing or malicious content delivery attempt. The ML classifier also provided a very high confidence score for 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.com/pify?keyword=hedonism+journal+pdf In PDF document text
    • http://files.alliesandfriendsmn.org/uploads/1/3/1/3/131380279/zugivina-xisajus-mutemobovovukil-kezamom.pdfIn PDF document text
    • http://files.mortgagenoteinvesting.info/uploads/1/3/0/9/130969001/jenuridusupug.pdfIn PDF document text
    • http://files.meanmaxbrew.com/uploads/1/3/1/4/131438460/tivome.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/1/0428/9835/8432/files/37144816260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9367/1590/files/sijizejad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/14883749697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/37230411358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/81804948260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5881/3342/files/xoxokulur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/wugivut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/kuvadagulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/gasap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0054/2878/files/karezolirubakovawubawused.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/78565149210.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 3

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_off000154d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D7 5024 bytes
SHA-256: ffe854fa45aa0cc83dff7aff076bb7f1f1eac113df47ba0d8c75b09fe3875920
font_01_sfnt_off000165c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165C5 10284 bytes
SHA-256: e44ad79e83424894b3f40b21593b74e1701e979abf69ca063412a53d1c955e2a

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