Malicious PDF — malware analysis report

Static analysis result for SHA-256 b670f7558c0be283…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 08:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8769dbd8967400c6145703b8cc887d20 SHA-1: 5b6ddb1cf32c5b66a4f617f46f5aa5b063fb9704 SHA-256: b670f7558c0be283c91f5961598c07791637b970efb573ff66fe5a31a9e4d0cb
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as malicious. This suggests the primary intent is to redirect the user to a malicious site, likely for phishing or further malware delivery. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious 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.ru/pify?keyword=fridge+temperature+log+sheet+free In PDF document text
    • http://files.tottenhamcommunitychoir.org/uploads/1/3/1/4/131407944/8229e0.pdfIn PDF document text
    • http://files.highdefgeoff.com/uploads/1/3/1/4/131484029/sonovigugav-palugi-fevozezuwujufoz-gopedabedukugi.pdfIn PDF document text
    • http://lubar.littletoncrabappletrail.org/uploads/1/3/0/9/130969352/xuzafadudatizami.pdfIn PDF document text
    • http://files.alohaestatejewelry.com/uploads/1/3/1/4/131482939/9e7664d6e.pdfIn PDF document text
    • http://files.iansturgess.co.uk/uploads/1/3/1/1/131164314/9444547.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/1/0436/8993/5002/files/55172128725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/blockchain_for_dummies_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1317992411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/viwutosovuxifur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3810/4985/files/html_input_type_file_accept_only.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/88258727562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/norditrack_cx_1000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/self_certification_form_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2182/0326/files/sowobazoluvaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/11992490775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/jotufipozeritewetirito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/63101479696.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 5412 bytes
SHA-256: 76d77b0d394df81dc08ef15283c4bbd9c2a3f67e8bd960de0acc873909f4dded
font_01_sfnt_off00007748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 12388 bytes
SHA-256: adfa76e0a0fe9e348133b4772059be1bfca904919f74494b7bd5903e885ae80e