Malicious PDF — malware analysis report

Static analysis result for SHA-256 e655a236a6d1b776…

MALICIOUS

PDF

44.9 KB Created: 2020-08-25 05:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 457310c33ee9fbeb0803a1722232544a SHA-1: ba78c3cf7c19483a5243c014801a59f6c1c25d42 SHA-256: e655a236a6d1b776e272d6f45ab1d98a3c8102df029093aa205dbe7f9fe6ce2a
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'The backwards law pdf' and the malicious URL. The presence of a PDF link farm heuristic further supports the malicious intent of redirecting users to external, potentially harmful, content. No scripts were extracted from this sample.

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=the+backwards+law+pdf In PDF document text
    • http://nugida.kendallgrundyfb.com/uploads/1/3/1/3/131383483/4300484.pdfIn PDF document text
    • http://rijelasug.charlescdixon.com/uploads/1/3/1/0/131070993/51390a83ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/19252126245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/52056841474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/cement_based_tile_adhesive_formulation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/47761939884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/18799477750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6260/7518/files/56194425424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/dugivobifekaseti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/wurixonatefonoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/2597779946.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655D 4932 bytes
SHA-256: 6596d3a2e6c6aa9e695f391c3ca6c3de958a3d964c0602f9424499513d8f1052
font_01_sfnt_off0000763b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 10272 bytes
SHA-256: c371d72baa103ad6fbf9a74904ecff9e0c361cdac99fb36ce6d4eed2467b0d07
font_02_sfnt_off00009936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9936 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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