Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dce787016f99956…

MALICIOUS

PDF

58.4 KB Created: 2020-08-21 20:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25520675a623270408f23a55ee85bda5 SHA-1: 684802b4f5ba6f825ac2f7fa6d7feff835c16454 SHA-256: 4dce787016f999560e37dba07ce39cbd4cf9bfedc5662c513cbceea600311ae1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=authenticity+paradox+pdf', is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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.ru/pify?keyword=authenticity+paradox+pdf In PDF document text
    • http://files.bluemountainseimei.com/uploads/1/3/1/8/131856646/wezoxovuvati_lobekili.pdfIn PDF document text
    • http://basipowek.joysofmommyhood.net/uploads/1/3/1/3/131398560/86f075.pdfIn PDF document text
    • http://files.evesartistry.com/uploads/1/3/0/7/130739802/xariregi-fibebupolutebof-lisun-gexifivapuraf.pdfIn PDF document text
    • http://nugavadab.carolconnor.net/uploads/1/3/2/6/132696056/kodekapimofi-katekogiriru-nobexezeges-vutosetevum.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/1/0439/1724/6632/files/basic_accounting_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3365/7495/files/valamiwelutogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/1026192245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/central_africa_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1136/7331/files/harman_kardon_soundsticks_ii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/patufab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8930/5506/files/moravia_il_disprezzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1836/1755/files/41463124880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/59917097544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/3064562563.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_off0000a80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA80D 5192 bytes
SHA-256: 66854a9b6f322c39c3ec219dc47161c4fa21bf0fe31a8098609af83c8cdfe1d2
font_01_sfnt_off0000b9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B6 10244 bytes
SHA-256: 2f849ab3dc9090329a1f0398f7b4c89104094e9a68f8e33be52247ad0e79b0a0

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