Malicious PDF — malware analysis report

Static analysis result for SHA-256 907e24b3716b84f3…

MALICIOUS

PDF

38.9 KB Created: 2020-08-14 13:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 459c699072e3a2d89ad1d45e519e6700 SHA-1: beb489880b99343081ed3eedbf290966095a11d5 SHA-256: 907e24b3716b84f3d194594261fef102ecb3467c696c756b3aa73010db698d4f
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to educational worksheets and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links, many hosted on cdn.shopify.com, indicates a coordinated effort to obscure the final destination.

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/wb?keyword=compare%20and%20contrast%20theme%20worksheets%204th%20grade In PDF document text
    • http://files.cchspostgrad.com/uploads/1/3/1/8/131857305/toteve.pdfIn PDF document text
    • http://files.benillis.com/uploads/1/3/1/4/131453651/jawatunidop_lutela_wibur.pdfIn PDF document text
    • http://files.pegasusstudios.com/uploads/1/3/2/3/132303170/3890881.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/1/0431/6089/5650/files/87093609802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/nevijabukej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4819/6513/files/water_supply_and_pollution_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/tabibodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/81838768837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/pixelema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/zesoronuvanobisisilatojiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/calisto_y_melibea.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/71034671915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0767/1447/files/adhd_treatment_guidelines.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 4

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_off000058f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F5 5604 bytes
SHA-256: e29fa188633ebc27afe493994e3fbb9899d205957a6f137eb236c0ae6e83de89
font_01_sfnt_off00006be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE8 10252 bytes
SHA-256: f64b924f998c6509bb8b95460494b9a84c9edd5c7586f191c1fac4e99bf778ba

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