Malicious PDF — malware analysis report

Static analysis result for SHA-256 1834b1fc6b94c94c…

MALICIOUS

PDF

41.1 KB Created: 2020-08-20 23:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 620b7b32eaa51a9b19e29abad36abe1d SHA-1: 6896e41a7b0aee21d643012a755452f4ef075e1d SHA-256: 1834b1fc6b94c94c99ea0e14f795e400a368960d90866d6887c68d68d5469167
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to an SEO redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting a lure for free content to drive traffic to a malicious site. The ML classifier also strongly indicated maliciousness.

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=kjv+bible+app+for+android In PDF document text
    • http://files.coutellerie-le-cellois.com/uploads/1/3/1/4/131437295/b660a.pdfIn PDF document text
    • http://files.pjeterkoleci.com/uploads/1/3/2/6/132681938/f414f68e3faf.pdfIn PDF document text
    • http://kekibu.threesisterstudio.com/uploads/1/3/2/8/132814930/litaximosumir.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/1/0428/9835/8432/files/rowogumidakedodovejizana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/yoshiko_kawashima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/44028758208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/free_brush_lettering_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/balance_sheet_reconciliation_excel_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/39809419958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/wezeluwojigisaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/71086808781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/48874837725.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 8

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_off00006446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 5100 bytes
SHA-256: 02c4efb71c66b50dc1f6a1b1b49228dabed9412d5a1fd2e78f2dbd7cadfeb611
font_01_sfnt_off000075b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B7 9932 bytes
SHA-256: 58aad2d272a0e91cf6dd23ce46e304aec731694d74e212bb4693fb5c07238013

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