Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d8b27e23df0e09…

MALICIOUS

PDF

49.5 KB Created: 2020-08-15 03:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f489f96ecd64074f693509a7b23b51b2 SHA-1: 3ad28acc7d785213b8d94b801d983aff0c59afba SHA-256: 25d8b27e23df0e09387a00c45aed3d5c6df01de903788f32bdc7762033b02838
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=edgerouter+er-+x+user+guide'. This URL is likely part of a phishing or scam campaign, attempting to lure users with a fake user guide. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=edgerouter+er-+x+user+guide In PDF document text
    • http://files.rachellekaldani.com/uploads/1/3/1/3/131379590/vaxekigiwax.pdfIn PDF document text
    • http://lizurag.bwtincoming.com/uploads/1/3/1/4/131406970/wekux.pdfIn PDF document text
    • http://files.abxs.org/uploads/1/3/0/7/130776150/nomat_piwunod_voniboxero_manej.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/1/0432/3442/7047/files/30855862350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8581/files/26831868402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/tukerodibip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3955/9573/files/pathogenic_microbes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/91929604500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9973/2635/files/56953845245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/suxerudadugurejalepoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/1225690607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/nujusevomovajuwutasafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6288/5541/files/senulesilazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/public_policy_formulation.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_off00007c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C22 4808 bytes
SHA-256: 5ea0bc54e0bb75f26c296447eb57b2a96f3b57d2373873dad4153a0d9a1c77ea
font_01_sfnt_off00008c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9C 13744 bytes
SHA-256: 6f908973ced5b5e57d23a0807d5f33c0249a89e290d3fe2a15b35e536f19dddd

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