Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5131b41e72c13d1…

MALICIOUS

PDF

97.5 KB Created: 2020-09-17 09:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fa8c51c49f4702c16bcd9ed82a4b603 SHA-1: c236c2a3cc4e808ca9b9e3f0e724af203b089d2e SHA-256: d5131b41e72c13d1870a78b1ddccd5b075856af752b701adcc7d421200026004
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to potentially malicious redirectors. One such link, 'https://ttraff.me/wix?keyword=homeowners+association+audit+guide', is explicitly flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to trick the user into visiting this malicious site. No scripts were extracted, and the PDF structure itself is the vector for the attack.

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.me/wix?keyword=homeowners+association+audit+guide In PDF document text
    • http://sarowug.iybibarberstudio.shop/uploads/1/3/0/7/130739443/75847df7.pdfIn PDF document text
    • http://files.swfoutfitter.com/uploads/1/3/0/9/130969191/rebelawudezezuguwaf.pdfIn PDF document text
    • http://files.bellacalore.com/uploads/1/3/0/8/130814279/mumubimogamu-fupedevumebat-ropetiwajo.pdfIn PDF document text
    • http://xuvoruju.reflectingonheartfailure.com/uploads/1/3/1/4/131406063/aa05df8a4895.pdfIn PDF document text
    • http://nedep.compliancemastersllc.com/uploads/1/3/2/6/132683008/xajiterikorabof-sodupekosusax-gofagozoxuba.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/1/0429/8165/4679/files/scope_of_work_construction_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/zemisufim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7649/2952/files/57257362352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/autocad_print_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5864/2595/files/bebofinefigovujej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1517/6096/files/ficha_tecnica_de_raven_escala_general.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/75750404763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4735/2480/files/radidoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/fourier_transform_of_sinc_function_matlab_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/dobuk.pdfIn PDF document text
    • https://290e07e5-5190-411e-8da9-1a94724851ac.filesusr.com/ugd/daca0d_e392e39848da4d0797c8bfb60fdc84ad.pdf?index=trueIn PDF document text
    • https://d856284f-7943-4798-8b2e-e6b4a919d369.filesusr.com/ugd/d4da64_ef65713034cd41cfaaf294f6a193478b.pdf?index=trueIn PDF document text
    • https://2657b5b5-a897-414b-8786-2c0e02b00615.filesusr.com/ugd/6924eb_6d8b0ca37b5249bf8e83e82652f3cc0c.pdf?index=trueIn PDF document text
    • https://82a41c8c-b3f9-4bb5-b401-bed50e866886.filesusr.com/ugd/28146e_255edcf5a77745a98a125e691640f9a6.pdf?index=trueIn PDF document text
    • https://1de5f78d-fb8d-4477-9ff2-59abc8e372b1.filesusr.com/ugd/43d598_843839ed58ea431b85af770ead668548.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14324 5280 bytes
SHA-256: af39b802ea128f8bde78e71886b8c860f9f9eb7b11712496443c5b02524bab36
font_01_sfnt_off0001550d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1550D 10428 bytes
SHA-256: 3e487e680b48f4c7022d9aa559c816b0aa1b1d41d2f7c336070ed141f3621b55