Malicious PDF — malware analysis report

Static analysis result for SHA-256 b664d777978b5850…

MALICIOUS

PDF

52.7 KB Created: 2020-09-05 07:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 783f51c8e3e02fedad20dbf26a991c81 SHA-1: 594f7f5463741254ecaa339acb49fedf87334cb2 SHA-256: b664d777978b5850686817b18fef58af2e6047a978be19188baad1f07c6eeb96
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic identifying a critical PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.link/wix?keyword=repairing+a+hole+in+a+sheetrock+wall'. Another heuristic, PDF_SEO_LINK_FARM, indicates a large number of external links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search results or distribute content. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, reinforcing the lure. 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.link/wix?keyword=repairing+a+hole+in+a+sheetrock+wall In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/74130623752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/38499091228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4519/0821/files/transformers_autobot_stronghold_2_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/diagnostico_de_enfermeria_cirrosis_hepatica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/cuts_you_up_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/66093306255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/75747781753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1882/1530/files/beginnings_and_beyond_foundations_in_early_childhood_education.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/52b593_1a0fa664e3704fa28c57ca43bff8949c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_757eb45f7b604307b38eaf564db98e1c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d216cb_1bb7b0ba0f3742e39bb70020cf44d183.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4542d9_4367d909078345c493d65edaa08a1b0f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/badafb_c41ab06d06534df2bd2c1c41fff21878.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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_off00007fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDF 5360 bytes
SHA-256: 45277e607b04d232adc4fcf4a6b217a28f484c3813473211aa401a00fbbf1c08
font_01_sfnt_off00009224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9224 6068 bytes
SHA-256: 1f79b081fe245cf9181f2e6ad484d5de3f355e0828dbe7aa1c14a68e096e11b6
font_02_sfnt_off0000a1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D4 10448 bytes
SHA-256: c54edaa55d42d518c85687219c4990d02e1e07186467f31c87c33936525dc89b

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