Malicious PDF — malware analysis report

Static analysis result for SHA-256 5132375f74e41bcc…

MALICIOUS

PDF

54.6 KB Created: 2020-08-22 22:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72835d034a0f575c599a9a60f52019fc SHA-1: eb2d016780a2202e052ca6feac181cece77dd2f1 SHA-256: 5132375f74e41bcca41cbe0b6113aade74d3648f5d1dab199b5ca5bd23797512
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to Shopify domains hosting benign PDFs, but one critical link redirects to `ttraff.com`. This redirector is associated with malicious activity. The document body, though heavily obfuscated, contains the text 'Biophysics book free pdf' and the malicious URL, suggesting a lure for users seeking free content. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the malicious nature of the redirector.

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.com/pify?keyword=biophysics+book+free++pdf In PDF document text
    • http://files.canineandequineranch.org/uploads/1/3/0/8/130813458/548cd8167a6.pdfIn PDF document text
    • http://xulup.1corinthiens15.com/uploads/1/3/0/8/130874113/lokuzanosafajovowok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/complications_of_general_anesthesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/99391040582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/69199890557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6017/3717/files/35408821331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8313/2056/files/react_native_cache.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4597/6221/files/haematology_textbook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/83221777645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/81592802393.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C14 4960 bytes
SHA-256: aeb64b57ef00a3843a672ef245b152360c65a160d804f5db5859e8cc50745a68
font_01_sfnt_off00009d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D00 10140 bytes
SHA-256: c1d6d7fb0ab8300a165ca8e82b3623cf91308689aaadcc598a3274a5ce913673
font_02_sfnt_off0000bf7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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