Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a5b7259567ad60…

MALICIOUS

PDF

38.1 KB Created: 2020-08-21 11:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59089eed173045631467848885556b03 SHA-1: 86aa56fefc6933ad6df3228d39f08c1f19cf0f80 SHA-256: 57a5b7259567ad60072e51f5d10c2eada8a1dfa61d2d3219159ac9668580452f
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 a primary link pointing to a redirector. This redirector is configured with a keyword suggesting a software download lure. The embedded URL leads to a known malicious redirector, which likely serves as a gateway to further malicious content or exploits.

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=adobe+pagemaker+7.+0+for+windows+8 In PDF document text
    • http://mixolafa.amusedowl.com/uploads/1/3/1/4/131438437/zamevireniwamog.pdfIn PDF document text
    • http://files.lotzmusic.com/uploads/1/3/0/7/130740625/9971523.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/1/0429/3564/8409/files/nuxotelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/60398250576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/10491289070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/materiales_dentales_macchi_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/controls_and_variables_practice_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4811/6119/files/electric_bicycle_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1730/5240/files/sydney_opera_house_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/tunareletikumigepejit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6181/9045/files/lujunerumugik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/igi_1_directx_for_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/pereminuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/94108049246.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
🗂 Part of campaign: amusedowl.com 4 samples

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_off00005392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5392 6060 bytes
SHA-256: c6cff570b7fa61508c9b018c2204c8164bbd5d23822fa72a4cdf218553fe5d0b
font_01_sfnt_off00006837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6837 10276 bytes
SHA-256: d9651b1525cafc8321cf68d0fec89da7a5ca4078f677e3ef9536f7554020ad3e

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