Malicious PDF — malware analysis report

Static analysis result for SHA-256 366c66d7fb1fb5f6…

MALICIOUS

PDF

52.7 KB Created: 2020-08-25 03:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90e1f75b4508231bfacbf010d9250e59 SHA-1: fff58b3b2aeb303ffaaf86d9b591fe8b61449bae SHA-256: 366c66d7fb1fb5f65f55b37ab6fe7008fb542bc3719600c864f6a8da1ca5d66f
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF files hosted on Shopify. This suggests a link farm or redirection attack designed to lead users to malicious content.

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=manual+usuario+baojie+bj+218 In PDF document text
    • http://files.sabasphotography.com/uploads/1/3/0/8/130873794/xuritudu.pdfIn PDF document text
    • http://rivivufu.friendsofstlaurencechorley.org/uploads/1/3/2/7/132740285/9db7b0d5652b.pdfIn PDF document text
    • http://tupevari.mylesateliersdenine.com/uploads/1/3/1/0/131070487/81f8235c56f05.pdfIn PDF document text
    • http://vugobefa.smarttouchskin.solutions/uploads/1/3/1/0/131070109/8273908.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/1/0432/3419/7666/files/laxokokupusanowevida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1305/3343/files/arcgis_network_dataset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/disogelabexumuzexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/23998892967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/approaches_to_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2392/files/easy_disney_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7967/9646/files/96891237832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/zefevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/15717707133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/dewafixabavujuraderada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/formao_da_atmosfera_terrestre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/bovoviwovebibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6062/4549/files/rasofutuduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/wewuxewijepolibidepanuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/62568138989.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 2948 bytes
SHA-256: f10e6a8c909a38f1fdaa1709ef4d42dffdd612f987edd83d7e797aced4d7d306
font_01_sfnt_off000067c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C9 5276 bytes
SHA-256: c735c501d0ca3a2ed6f2eb7c8e34db4416ceac00d166c86a2becc54e1dac77d2
font_02_sfnt_off000079d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D3 17480 bytes
SHA-256: 2558a6720854a944ff787c3da584ce68386226d37dce4e1d6f7f3ee19c5fa6ee
font_03_sfnt_off0000affc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFC 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e