Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bcf50d58462a36…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 23:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 811607e4e3b3b72372b2db7d4766b56b SHA-1: 0e758d82552d8dfb30053f89f4930de27c6adaaf SHA-256: c8bcf50d58462a36fd020fafc03fee5612611c7c5b2b5b7ef6dce54f8b081d4a
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Solar system gif free' and the malicious URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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=solar+system+gif+free In PDF document text
    • http://files.kaitcalabro.com/uploads/1/3/0/8/130813111/7151196.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/1/0432/3685/1874/files/jiletav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/23974042744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/zijisibivitibeviditozori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/carlos_castaneda_the_art_of_dreaming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/2_4_4_engineering_lettering_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9657/5904/files/past_simple_vs_continuous_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/16540904505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40573574370.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 3

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_off00006357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6357 5292 bytes
SHA-256: a918dfd0bff58acc42ab77b5d2fd8d66d2724892d584b01bc09454c5a3c51780
font_01_sfnt_off00007544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 9836 bytes
SHA-256: ec4fc8d9b805c47fcff7af223224b165d14e88a14a8a49379f37bb15cf82dd2c

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