Malicious PDF — malware analysis report

Static analysis result for SHA-256 21980e1de0068784…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 13:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffa698ac2edd054ecc1de5eca22cc728 SHA-1: 6e71073105d363a600a76193552dd652d64c5ed7 SHA-256: 21980e1de006878403b984a26d257b0f5a6d7dc2fe32627c3d33e948a589c80b
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to external PDF files hosted on various domains, including shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a distribution point for further malicious content. The presence of a mass link farm suggests an attempt to manipulate search results or distribute malware indirectly.

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=aparato+reproductor+femenino+externo+pdf In PDF document text
    • http://files.ne-surgerycenter.net/uploads/1/3/2/3/132303170/bojen.pdfIn PDF document text
    • http://files.graceyfeet.com/uploads/1/3/1/6/131636775/4458505.pdfIn PDF document text
    • http://files.dccsac.org/uploads/1/3/2/7/132712129/pidosedewujoxalob.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/1/0434/3827/6760/files/kafokij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/72133116410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8701/7637/files/ac_to_dc_converter_project_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/nibof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/95727106644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/madegorumasosipun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6660/3158/files/81892064736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/dajabafujovubaxaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/30936069026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/mebibozimokelopepunewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/lerinidoxojuzixinabus.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_off0000713c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713C 5148 bytes
SHA-256: 376e41539c73d3eddc58a62de7d165c95d2c00c2b4d08c4ebe8c276c668edac9
font_01_sfnt_off000082b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B7 11032 bytes
SHA-256: 9a42c3ad55f47a3f61969adc012193afe0861216c39f355baaf33576cbf985a5

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