Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bb7636455f1a47…

MALICIOUS

PDF

41.6 KB Created: 2020-08-24 17:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3342b485c3330ab9ba000a3b13c5a132 SHA-1: 28fd7df07da3aa02e4048240072b1ab9902c6ae1 SHA-256: 20bb7636455f1a4783795433b2434b893a4c5d7ebf1c9eef5803b0619e81acaa
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=enhanced+recovery+after+surgery+guidelines'. Additionally, the PDF is flagged as a link farm, containing numerous external links, many of which point to potentially malicious or SEO-farmed content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link within the document.

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=enhanced+recovery+after+surgery+guidelines In PDF document text
    • http://wabili.crusingonargo.com/uploads/1/3/1/3/131398589/rarudebiteduwer-sotadino-xonewoperuvevir.pdfIn PDF document text
    • http://vofufum.twohappyhedgehogs.com/uploads/1/3/2/6/132683001/4758757.pdfIn PDF document text
    • http://files.jimmydebutts.com/uploads/1/3/2/6/132681771/5011483.pdfIn PDF document text
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdfIn PDF document text
    • http://wapevo.leaddeadwoodartscenter.com/uploads/1/3/1/3/131379833/susosowilafevufi.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/1/0429/9217/3217/files/53081138061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/56776078253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3638/4149/files/vasolorizuwusalixinat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/doctor_strange_hd_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9543/6955/files/engineering_drawing_tutorial_ioe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7039/8357/files/84042747975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/20311744406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3569/7063/files/libuxafulibunoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7741/0724/files/bitawopivetes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6670 5400 bytes
SHA-256: 8681a15cae1287ff27012b7c4b73c97126907e615d329416a811017721afe28b
font_01_sfnt_off000078c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C9 9604 bytes
SHA-256: 8a02548b5330a2ea985ab6386817efa732daa752513518e74287e2d79377b073

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