Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a77f15834285221…

MALICIOUS

PDF

65.2 KB Created: 2020-08-07 22:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e85a2d19e0619b2aa109c0cdcf1e404a SHA-1: 680095922eb0f5ff5abadeecf8dac60efd5fde42 SHA-256: 5a77f15834285221c024f44f713a8e24b43f19514f1e62726aff11d24e37f6d6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.ru'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=caperucita+roja+cuento+original+pdf In PDF document text
    • http://files.encroixdanceacademy.com/uploads/1/3/1/3/131380171/3490625.pdfIn PDF document text
    • http://files.3blossomscafe.com/uploads/1/3/1/4/131453904/gituragogan.pdfIn PDF document text
    • http://perisaze.counseling4allseasons.com/uploads/1/3/1/6/131606758/pixosoxu-fajotejelisa.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/1/0432/7365/0334/files/calderas_acuotubulares_caracteristicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/62699037076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/tekenenod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/79634413496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/83586533040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/16637939228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/26301320407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/vapifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/vovavajugen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/78433368173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/artificial_neural_network_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/revuwiregasil.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 4

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_off0000c33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33F 5128 bytes
SHA-256: 8d1a78e6c33664bd97578e0a32d1f0e7ce5bfe2708ac4b904c82c5dc18d66146
font_01_sfnt_off0000d4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C4 10400 bytes
SHA-256: aec4512503fc6230504cd653355d7676f564ef1e198bdb1b8635ef749fa61b77

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