Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5371ab618efa010…

MALICIOUS

PDF

56.5 KB Created: 2020-08-15 05:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f020d7f87231f09df84137a8a8db6981 SHA-1: 1258cc55238b594bf882e4da915660ac5799030b SHA-256: a5371ab618efa010868c7aa7a1aa7a61b38b10f57a6f0ca0d9e1f3bafc1f3dbb
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The document body, though partially corrupted, suggests a lure related to 'dnd character sheet pdf'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=dnd+character+sheet+pdf In PDF document text
    • http://futid.portraitsinsong.com/uploads/1/3/1/8/131872225/9649537.pdfIn PDF document text
    • http://files.cornbreadandhoney.com/uploads/1/3/0/7/130775245/9365745.pdfIn PDF document text
    • http://files.wormfoodforthough.net/uploads/1/3/0/9/130969243/e9c22e71c4f8.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/1/0437/0182/9797/files/41670745530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/latavaropijozinub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1847/7987/files/tewamutabawutikulalel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/waste_disposal_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/65522532506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/xowanegabufavoxaruwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/sonda_vesical_mujer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/sapozunusisif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5781/4431/files/parametric_design_for_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/nugiviwufewub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1121/4245/files/abolition_of_man_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C5 4840 bytes
SHA-256: e9f7010569b85f51fa2a4e1745ef5bdbea7216e2da323bb823dbe715dfa40f77
font_01_sfnt_off0000a323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA323 10528 bytes
SHA-256: f7674920561e2aaf69b9599791a0b94e911e1ebda8d124cf6614daf3196cdfc4
font_02_sfnt_off0000c726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC726 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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