Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4890b085d55e49…

MALICIOUS

PDF

37.8 KB Created: 2020-08-24 22:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a904e3178d1c128f71a41cf596c2ef59 SHA-1: 7764b2c55825f8b155e3ee5b93a593758324bbe8 SHA-256: 1d4890b085d55e49d910061929a8ff94281d27add5bd1f32c3da06f88aa85234
202 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=bunco+score+sheets+to+print'. The document body also contains a visual download lure, reinforcing the phishing attempt. While the document body is heavily obfuscated, the presence of the malicious redirector and the link farm strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bunco+score+sheets+to+print In PDF document text
    • http://xiber.caribbeanfusion.co.uk/uploads/1/3/2/6/132682883/27f6b2eb10f28.pdfIn PDF document text
    • http://files.synergycs.net/uploads/1/3/1/3/131397973/lefenam.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/1/0457/3734/5180/files/shining_force_1_promotion_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/pdf_rotate_single_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/megan_rock_of_lov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/webepegamab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4050/4999/files/azotemia_postrenal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/certified_ethical_hacking_version_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/foxewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/evangelhos_apcrifos_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/70202166558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/avery_5160_labels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/point_click_care_user_manual.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_off00005758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5758 4828 bytes
SHA-256: 9adae53ec19b267376d8bf5f4b87373bb6c54cd310372f1346fe16ff2e06aa97
font_01_sfnt_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 10364 bytes
SHA-256: 1a0e4a94ad2875dd0fa4c566a8aacd8b02505697c7dd963735b9212030b4a610

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