Malicious PDF — malware analysis report

Static analysis result for SHA-256 4485c9560bee0ff3…

MALICIOUS

PDF

32.7 KB Created: 2020-08-14 00:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84269c4bb91c7b6871294a7a12e6024f SHA-1: 02f1db7f9c0ad2cebbd206759470fd300613046c SHA-256: 4485c9560bee0ff3fdb136c873a3f8cf1692907ddd70cd79ed671d5ee5f146a7
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=rebar%20bender%20manual', suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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.com/wb?keyword=rebar%20bender%20manual In PDF document text
    • http://keger.sojofireproject.org/uploads/1/3/0/7/130739777/446072.pdfIn PDF document text
    • http://files.westernwc.info/uploads/1/3/0/9/130969300/9471533.pdfIn PDF document text
    • http://files.allseasonssportsmensexpo.com/uploads/1/3/0/8/130814758/3050677.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/1/0441/4029/8392/files/feful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5275/9200/files/42808147832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/titijugume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/navilag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/last_remnant_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/vinomaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/fozodabagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/the_adventure_of_tom_sawyer_bangla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/vowoxixuvepatojonaselari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/pafonitafur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/waec_technical_drawing_past_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/46817055953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/romoloxerokimukunurotufeg.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 6

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_off000045c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45C4 4940 bytes
SHA-256: 1e44519c9f483ea28ae31b8fae18648864dc10dcd2731ca28a8e06193ce4832e
font_01_sfnt_off00005676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5676 9360 bytes
SHA-256: 188faf430ca8138b94fc3bb807b185a483a05cf5f332abec61326e99d0c7ee77

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