Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb553e40f0e9c856…

MALICIOUS

PDF

36.7 KB Created: 2020-08-05 08:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4512409349fce5b02a5a03e197bb26d SHA-1: 971b7740793e5642106a0ed433fbe69910134ce9 SHA-256: bb553e40f0e9c856849bf3299dba298bceb32cf449939e88639a03de8462132b
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'ttraff.cc'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting the PDF is designed to masquerade as a benign document while directing users to a potentially harmful site.

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.cc/pify?keyword=dilations+worksheet+pdf+kuta In PDF document text
    • http://files.renndrive.com/uploads/1/3/1/6/131637136/momozadoxa-xiludeduseven.pdfIn PDF document text
    • http://files.janeramsey.com/uploads/1/3/0/7/130739883/043c5fe929c.pdfIn PDF document text
    • http://files.drderickclinic.com/uploads/1/3/1/0/131070798/e63d571860bc.pdfIn PDF document text
    • http://files.lenorathompsonwriter.com/uploads/1/3/1/8/131856984/5513442.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/xijikexikakem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6441/6661/files/rimibamijeravujoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5481/6667/files/22365020192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/70261856975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/ford_f250_repair_manual_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/diwopifivazebujigozes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/legend_drake_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/77252288596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/dovosasegot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6935/5670/files/american_airlines_microservices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/sajetakuzan.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
🗂 Part of campaign: davidhdenton.com 5 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000444d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x444D 5164 bytes
SHA-256: eed7335025e3c5fffdd094af639c5e5328856ff2c3b15b8d3b18c5846bc621f3
font_01_sfnt_off000055e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E1 10120 bytes
SHA-256: da5ab3b44df8eeaa80f78686c8ab11cbf374b01800721a9b0c28907900952db6
font_02_sfnt_off00007855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7855 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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