Malicious PDF — malware analysis report

Static analysis result for SHA-256 55da1ccc5455aa47…

MALICIOUS

PDF

50.1 KB Created: 2020-08-09 01:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49c21301a725f70c9d40bb683da3e716 SHA-1: dd1d53a89c2cb19fb51323d5f424c893c86e6039 SHA-256: 55da1ccc5455aa47021ab5059c35c338f423c366432acde4ed15479bb8acd5fe
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure related to legal documents and contracts, aligning with an advance-fee scam. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful site.

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.ru/pify?keyword=law+obligation+and+contracts+pdf In PDF document text
    • http://files.elemenoenglish.com/uploads/1/3/1/8/131856815/4410644.pdfIn PDF document text
    • http://files.wbmconference.net/uploads/1/3/1/8/131856949/1e8e1184d27d34.pdfIn PDF document text
    • http://fopus.boynecityhardware.com/uploads/1/3/0/7/130776485/goxavoteribeguwonum.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/82191842179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/4736594932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/9258158702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0479/2729/files/cadena_de_suministro_tradicional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/best_minecraft_parkour_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/39992192519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/zixipadigoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/favuwarumipuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/atharva_veda_in_marathi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/contract_from_below.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/46052714415.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E2 5496 bytes
SHA-256: cd1a948633613a8d7b96ba20fcab5f3a72c682a8b604d85c3c38ed896ca91d83
font_01_sfnt_off000095b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B5 11024 bytes
SHA-256: c04b7bcc192043e4676c5ae845c949a41e400ffe171472a0259e540aefbefd40

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