Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c31bcc1bbf01f7…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 06:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8c0d0857d630dd9ac311f1fc8748fa1 SHA-1: 677a574e7e6bfec2f6e065dc08c0b762898877e0 SHA-256: 84c31bcc1bbf01f7d9cb6965b1e97345f833e476ef1d2893f2f67b9d5ec161be
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 redirection to known malicious infrastructure via 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same redirector URL. The ML classifier strongly flagged this PDF as malicious, suggesting an attempt to exploit users through a link farm or phishing lure.

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=mastic+asphalt+sheet In PDF document text
    • http://files.mareadingcouncil.com/uploads/1/3/0/7/130775970/bb414068.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/1/0430/7920/5018/files/72903104552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/my_code_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9195/files/5418148277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/45703568120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3057/2190/files/rejuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/daterejijuzeronipazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/commander_zilyana_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0495/2477/files/48127710716.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
🗂 Part of campaign: collettecollingeart.com 4 samples

Related samples 4

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_off0000731a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 4504 bytes
SHA-256: e959d0f89fc643f2b3b87b7d58e2fa8d1d80c96f6a1c83ac6f64cea38a81c7ac
font_01_sfnt_off00008268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8268 10140 bytes
SHA-256: cfc300a9a49523fbf11c18e5095d1e5b3cb7266f4954adeecdc85ab4976e6114
font_02_sfnt_off0000a51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA51B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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