Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b20ca4a951dd20…

MALICIOUS

PDF

58.8 KB Created: 2020-08-23 00:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d21906f6295a21365088f3fb0eac3219 SHA-1: 8cf727a80eb3b5a4e315d30f0665796c0a9995f9 SHA-256: 17b20ca4a951dd209a40d4940b7d24aeacf92692d14914360ad60172ec60d4b8
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=adverse+drug+reaction+ppt+pdf'. Another heuristic identified a link farm of external PDF links, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

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=adverse+drug+reaction+ppt+pdf In PDF document text
    • http://files.valleyrootsfoodhub.com/uploads/1/3/0/7/130740344/fa8b50ce.pdfIn PDF document text
    • http://files.sukiscaninerescuecrew.com/uploads/1/3/1/4/131452735/be1a0a2b76a74.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0437/3777/6289/files/20005912841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/bahubali_audio_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/zipibexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/57502550340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/fadusizedit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1170/files/media_player_classic_codec_pack_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/94902333313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/61255481048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/48843336162.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008bc8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8BC8 13048 bytes
SHA-256: 3ff6429fa27f26558a1f7fe4484c77439dbbf6be962b22757a114602dbe492d7
font_00_sfnt_off0000712e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712E 1684 bytes
SHA-256: 4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50
font_01_sfnt_off00007992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 5340 bytes
SHA-256: d38abc36736e54e8f571f6afdb349e4485107051713427928e34dbee7f7877e9
font_03_sfnt_off0000b0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E4 14308 bytes
SHA-256: 153bb7e21f57cce854a729d22001c03853176f4b0297c97bf6a398e427c60773

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