Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d0b4b50fcd25ce…

MALICIOUS

PDF

59.7 KB Created: 2020-08-15 18:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8117763a4c7bfb1b84ffb142b244718 SHA-1: 3b7b5d1c8a21afea465e5d40126d9e34f0b6461c SHA-256: 84d0b4b50fcd25cecbdedc0869c45efe757d33b2451ec0715e44b10ccaf60743
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector disguised as a manual for Samsung Bluetooth headphones. This link leads to the malicious URL https://ttraff.com/wb?keyword=samsung%20bluetooth%20headset%20level%20manual, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=samsung%20bluetooth%20headset%20level%20manual In PDF document text
    • http://files.lavingtonurc.org/uploads/1/3/1/6/131606011/8695127.pdfIn PDF document text
    • http://files.hugoedgar.com/uploads/1/3/2/8/132816165/3057520.pdfIn PDF document text
    • http://files.contemporaryundercurrent.com/uploads/1/3/1/4/131438211/woguro.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/71340125447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/1465653783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/dajavujadenuluxavid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/56193457254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9289/6920/files/14712637165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/ashrae_handbook_2020_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/kuvasiziwununijimuluru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/gijawo.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_off0000ac99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC99 5444 bytes
SHA-256: d9f4582ba72a523f37a13cc6f27a721343eb47d728d3aa02d48b3149df23c4f5
font_01_sfnt_off0000bef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF5 10420 bytes
SHA-256: c03a2350b7e695ba1bc9e1f87d32f6ed68a197203f9b9769700d92fa5325330c