Malicious PDF — malware analysis report

Static analysis result for SHA-256 e190a1f7cdf4f084…

MALICIOUS

PDF

40.8 KB Created: 2020-08-04 08:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a91e3989c70ba63450920dffe06f4890 SHA-1: c71bbe72ae6cd7b42370fee03e164faa4b51e581 SHA-256: e190a1f7cdf4f0845d38dae6e6e24089de7939e163ea3e44c82cf4997f99d0be
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'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to coloring pages. The presence of a link farm heuristic further suggests malicious intent to distribute links. The ML classifier also strongly indicates maliciousness.

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=mosaicos+para+colorear+por+numeros+pdf In PDF document text
    • http://files.laohalbany.org/uploads/1/3/2/6/132681928/powisusuba.pdfIn PDF document text
    • http://files.illuminatingideas.org/uploads/1/3/1/4/131438823/tasexogejotemod_safutedapewano.pdfIn PDF document text
    • http://files.alexandrazellerarted.com/uploads/1/3/1/4/131482866/9179346.pdfIn PDF document text
    • http://files.ammoniteyarns.co.uk/uploads/1/3/0/7/130775658/vugegubupivig.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/1/0431/7013/6230/files/19793693086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/rikasemuvekitizevovawug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/worotivujir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/84829248727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/razer_synapse_not_detecting_keyboard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/vimulowurademabiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/gejetoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/20562141560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/27798317162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/59535660684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/nazawulolizutinosurikifam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/11239583556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/widewakosekoxuras.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off0000499e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x499E 5304 bytes
SHA-256: 3b7f185b347cbeb58257f6761596087a2ed13c734e2fd5ce954c6b47e5755006
font_01_sfnt_off00005b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B99 10748 bytes
SHA-256: 8d3c07601aeeebf8b8ba5b514855b1eb80a89e4258aaf97b34bbb15dc3be8070
font_02_sfnt_off00007ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF0 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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