Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec4763b74462551…

MALICIOUS

PDF

47.6 KB Created: 2020-08-12 07:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 614ec49b88bbeb578feac2c277213dfe SHA-1: c27117444e30cd5555ca503650b11b0030feb0cf SHA-256: dec4763b74462551bcb1404b5c9ae9f26084173e106d64919349a622db8e52d4
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to a 'Rheem 50 litre hot water system manual' and the malicious URL. This suggests a social engineering lure to trick users into visiting a malicious site. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content.

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.cc/wb?keyword=rheem%2050%20litre%20hot%20water%20system%20manual In PDF document text
    • http://files.about666.com/uploads/1/3/2/7/132740435/mamazotogelanit-kewizum-pugilaguvukax.pdfIn PDF document text
    • http://files.rainsparkle.com/uploads/1/3/1/4/131406390/a66260f2521.pdfIn PDF document text
    • http://jajozi.frpstudio52.org/uploads/1/3/2/6/132696323/323053.pdfIn PDF document text
    • http://files.flaglerbullsharks.com/uploads/1/3/2/6/132682386/9847540.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/1/0430/4361/8965/files/69604523803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/61378420520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/75504443584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8748/7395/files/65697034565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/6816/4005/files/favitiduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/27983243999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/54143067079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/53691610922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/how_to_install_seus_shaders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1569/9621/files/xaxafotafogipededuwasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/85203538068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/84139621667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/sepuzixekiweke.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 1

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_off00007b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 5392 bytes
SHA-256: 5adeb8e05d54f66f6c43f21a8e23f67da45146eaee9fb5179f0eb686fe774cdd
font_01_sfnt_off00008d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D66 10612 bytes
SHA-256: 8c7f388bc54919c45cad23ce5f2b9b493a607e47d33d9f9792a29dc243d556ea

Open this report in the interactive analyzer, or submit your own file for analysis.