Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1ba8f5ff737231…

MALICIOUS

PDF

48.3 KB Created: 2020-08-12 00:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8ea5bc019d9d9f6f2dfbe059025edab SHA-1: 57c0568ed19764417f75c1f720b7864b44358967 SHA-256: 5d1ba8f5ff737231b2af67d6a307f868207f73fa3068b975c5eb6f6f3a75a8a8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body and heuristics indicate a lure for 'Act practice test pdf mcgraw hill', suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms the intent to lead the user to a potentially 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.com/pify?keyword=act+practice+test+pdf+mcgraw+hill In PDF document text
    • http://files.classicfinancialsolutions.com/uploads/1/3/0/7/130776483/wuzukupego.pdfIn PDF document text
    • http://files.furnacemountainzen.org/uploads/1/3/0/9/130969300/2030815.pdfIn PDF document text
    • http://xugepag.strandeddog.com/uploads/1/3/1/4/131483337/xizamibipivijomufife.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/1/0429/5114/7676/files/29899614098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/81432672673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5126/1853/files/68168868099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2806/5949/files/como_converter_em_dwg_autocad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/xowamavexidodedetereg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/muvizefusegusagovujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5462/9015/files/jowoxidotubagatugerivilex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/61862894598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/xewobegesegawokotow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9384/files/murivivigarofoseribefowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/magic_8_ball_responses.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A9 5652 bytes
SHA-256: b6ea0fdbe549e4523d6449a7ad359360225016f67a38ecdf109e9caef335ce7f
font_01_sfnt_off000089c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C8 13396 bytes
SHA-256: 1cf17fc6420b6ac02c7296233f1a40f8ee36d3afedaded45aaaec889cca100a4

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