Malicious PDF — malware analysis report

Static analysis result for SHA-256 280c09a89fc25131…

MALICIOUS

PDF

46.2 KB Created: 2020-08-24 22:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d3bba52124eec23c4562b573a969b09 SHA-1: 40a0cb367ca8f51cbbe7ee36a914f79466956d35 SHA-256: 280c09a89fc251318c8d8187fe2de0a25beb660c775a5bff7fcabf865b8ab5a2
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.cc. This indicates a link farm designed to direct users to malicious content. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. No scripts were extracted, but the PDF structure and link farm strongly suggest a malicious redirection attack.

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=scrambled+paragraphs+worksheets+free In PDF document text
    • http://tefomeg.michellebergermd.com/uploads/1/3/2/7/132741009/5f1ac9e672e86c.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/1/0434/3640/8982/files/konibasep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/71786634242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/biohacking_exercise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8869/0844/files/10596259340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/19254175176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/91390563273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/40719796921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3722/8188/files/elektrik_arpmasna_yaklam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3501/7884/files/87787422331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/wowamesufitowar.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 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_off0000677b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677B 5968 bytes
SHA-256: be7d07326508dfd86ad1c5c55b64d520cd1f7a845d67a888700e8ac087a83016
font_01_sfnt_off00007bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB2 15880 bytes
SHA-256: a7c1cd38c31439b0fa2ea1eade9a77ca2a15ab7f17634d87e7f6f71f43f11c0b

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