Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c16397f0206e623…

MALICIOUS

PDF

33.1 KB Created: 2020-09-10 11:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8fd6783725eaca162b9d9659381363b5 SHA-1: 38e452b01b2e04a973d5d132702fd6f3ac8111bf SHA-256: 1c16397f0206e6233088aef96e86ff8214a55aade519de6ce9e984fa0bbb5480
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, characteristic of a link farm. One critical heuristic firing indicates a malicious redirector link, specifically `https://ttraff.club/pify?keyword=civilizations+develop+around+the+world+answer+key`, which is designed to lure users into clicking. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The file is likely part of a campaign to drive traffic to malicious sites.

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.club/pify?keyword=civilizations+develop+around+the+world+answer+key In PDF document text
    • http://xuwuveg.thepilatesgathering.com/uploads/1/3/1/6/131637136/womiwudebibal.pdfIn PDF document text
    • http://files.loumurrey.com/uploads/1/3/2/6/132682542/rajun.pdfIn PDF document text
    • http://josojek.orthodoxiona.com/uploads/1/3/1/1/131163981/4386782.pdfIn PDF document text
    • http://files.thevillagepets.net/uploads/1/3/2/7/132740214/8505358.pdfIn PDF document text
    • http://jaloxore.felipehuesolaw.com/uploads/1/3/1/8/131856033/1345921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/3be3a7_39c06410807845d58ac75b28359b7e3b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a8cc01_7a4fe07137454ccdb2608c6e5c2546b8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/98d33d_2d78ce9d9198416fb48a721b923df738.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de60da_3efbfa0cd5454a14b50a5e7e4a6b279c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1621/files/too_many_items_1._13._2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/67353286643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/83546057374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/struts_1._2_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0082/2934/files/cape_town_map_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

Related samples 5

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_off00004523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4523 5320 bytes
SHA-256: 762addf01b0da7997de0d47fa79d804eda814973637047bf948d674430e779fe
font_01_sfnt_off00005750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5750 9404 bytes
SHA-256: 8473ce2ed97da7bb52e364de3b853660885006b3e38edd556932a2621632e9d6

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