Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b648707fc9c2cb1…

MALICIOUS

PDF

39.1 KB Created: 2020-08-22 13:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e76bf66a2353c30a95c503be9775583d SHA-1: de21b4739df84692dfaddb97943e9b32f37d4e14 SHA-256: 3b648707fc9c2cb1439c4b61c0a9d987f6bb0dbb174c95f5ae3c25d341aa00bf
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'jumbled sentences for class 10 with answers' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary attack vector is likely social engineering, directing users to malicious infrastructure via the embedded links.

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.ru/pify?keyword=jumbled+sentences+for+class+10+with+answers In PDF document text
    • http://budew.shop-blace.com/uploads/1/3/1/3/131379179/f6b622d93.pdfIn PDF document text
    • http://nadijup.aztrinitymusicacademy.com/uploads/1/3/0/7/130775455/c35d3.pdfIn PDF document text
    • http://files.skylinehoney.com/uploads/1/3/1/0/131070508/viwetu_sujubiso_riwen_jinanasuz.pdfIn PDF document text
    • http://mired.pickphysics.com/uploads/1/3/0/7/130775027/rikagajonedew_wuberifekez_lejimikepusep_durab.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/1/0440/8714/8709/files/54080333487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/73920158538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/80958550322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/the_witch_on_dvd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5280/1943/files/91610085653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90840236881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6951/4404/files/sexefolejulopazugol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/dysfunctional_attitude_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/boberafulufiwonijanebup.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 6

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_off00005a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3F 5676 bytes
SHA-256: 4d1afa0ebfeb4a0d7ceade6a5981f39d537dd14813633f7069538ceaa7d61f10
font_01_sfnt_off00006d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D72 10020 bytes
SHA-256: ca659201b00420ed5fa4622eb5981067f528ebdf82b999c51e969076fc358875

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