Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a23b6697318b7dc…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 00:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 12b12024db8e1ed15defbb4026cb489b SHA-1: 43c69349cae7ae4d29e634b3c6ddba2618aa6bac SHA-256: 1a23b6697318b7dc42e487cb4b5e3d54206d0cde56fada8f671b6375c1b16d64
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=blue+butterfly+wallpaper+hd', which likely serves as a redirector. The document body contains garbled text but also repeats the malicious URL and several Shopify-hosted PDF links.

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=blue+butterfly+wallpaper+hd In PDF document text
    • http://gizorepan.dancinggiantgames.com/uploads/1/3/0/9/130970009/mepamifigar_kizinanu.pdfIn PDF document text
    • http://nudof.tendcraftco.com/uploads/1/3/1/4/131454065/5594338.pdfIn PDF document text
    • http://files.shelburneprimrose.com/uploads/1/3/1/4/131406758/fobitozijeneba.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/1/0433/4652/6361/files/lodilulotakijonedugagami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/battlefield_bad_company_1_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7710/8647/files/38095546860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4697/3088/files/patologi_klinik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/lazizelisaxuzakugifav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/bronchitis_antibiotic_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/border_movie_song_ming._pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/biodiversity_loss_in_ethiopia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4849/1425/files/burp_suite_cookbook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/angular_formarray_setvalue_example.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: shelburneprimrose.com 3 samples

Related samples 2

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_off00006141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 5336 bytes
SHA-256: ed9a29f4f6747f4949e20bb51da6d8e22c6abb584bebaa87be87829dd7bf9f3b
font_01_sfnt_off00007377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7377 10288 bytes
SHA-256: 8511dd252711a221fc4bdc2cc5e21f2630eca726009fc23da250603a5776de19

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