Malicious PDF — malware analysis report

Static analysis result for SHA-256 1653d0546652e3d3…

MALICIOUS

PDF

321.4 KB Created: 2020-08-26 18:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 967638e8fabafb54ba037998a1f00fdf SHA-1: 6d7aa6e6d02f8e0b2ef152b28efa5a70d4bc726d SHA-256: 1653d0546652e3d3ccbdba058cb16634cbd3892e675247eb903f416d0ad03060
134 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://ttraff.ru/pify?keyword=call+of+cthulhu+player%252527+s+handbook`. This URL is flagged as a malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=call+of+cthulhu+player%252527+s+handbook In PDF document text
    • http://files.mhcchurch.org/uploads/1/3/1/0/131070520/buwotabiwazi-migewusurolex-lodiwafusugakod-mifegejobino.pdfIn PDF document text
    • http://files.chicagoforchicagoans.org/uploads/1/3/0/7/130775934/tebixiganafo.pdfIn PDF document text
    • http://files.doublempartners.com/uploads/1/3/0/8/130874162/xexojelotejizelavodo.pdfIn PDF document text
    • http://fifino.drvegetableinc.com/uploads/1/3/2/3/132302868/85ad8af17809.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/1/0431/6335/3244/files/rigimebapimupepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/allen_bradley_contactors_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/11162627173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/aldehyde_ketone_and_carboxylic_acid_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/rugetagunafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/38242492275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/fuxavivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/19181140131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4061/2262/files/dubuvibolaremebojofafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/bevufuzoroloxilefopogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/31115988828.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_off0004bcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCAE 5488 bytes
SHA-256: b8f03fcb06711a6a949858a505c8c8a13df862f57b222e914b475936ade7875b
font_01_sfnt_off0004cf59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF59 11860 bytes
SHA-256: cbc002c046051cd35019a25250c3adf7d43d7f1318c8da71ca0e48d452bf350a

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