Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b829909cb090564…

MALICIOUS

PDF

44.5 KB Created: 2020-08-20 13:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 64b0d366f682e208393a1847c4f5aaf6 SHA-1: 1fe96b60a0198abdc630470575530d752701877e SHA-256: 5b829909cb090564b7ca05771f91d78cff0c8e7422a665bb572f7db66f8eb42e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirection and SEO link farming, specifically pointing to the URL 'https://ttraff.com/pify?keyword=business+letter+format+ms+word'. This URL is used as a redirector to potentially malicious content, disguised as a download. The ML classifier strongly supports the malicious nature of this PDF. Although no scripts were extracted, the embedded URLs and redirection behavior are indicative of 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.com/pify?keyword=business+letter+format+ms+word In PDF document text
    • http://xobuxo.primarytackle.com/uploads/1/3/1/0/131070571/dagogopu.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/1/0434/3224/7457/files/dr_brian_weiss_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/bharathidasan_university_ma_english_syllabus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/python_asyncio_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/tebefimusubijutisafuwikuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/degejuwetisagemudow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/2945266278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/lumubozotasor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/resemovixogur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/alexa_cheat_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/world_edit_bukkit.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_off00007196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7196 5196 bytes
SHA-256: 486912a2659fd5bead48d77925fe7879869b9bbf9c559272106ecffc06423056
font_01_sfnt_off00008331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8331 10128 bytes
SHA-256: 9d328c222e5c6739cceae7e64cc17a250f21c2cc17fb870f3f698fca916f46e2

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