Malicious PDF — malware analysis report

Static analysis result for SHA-256 defa502f281bcae9…

MALICIOUS

PDF

35.5 KB Created: 2020-08-01 07:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53b518754a0ec0e2fe71057a8faefa0b SHA-1: cf101684b0e76b217bb71d16e7801f8c57e65db4 SHA-256: defa502f281bcae93ce495f587584f69b63f82d6ff1bef7ff3869db9a9885db3
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning or phishing campaigns. One of the primary links, 'https://ttraff.ru/pify?keyword=xcom+2+co+op+mod', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious content. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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=xcom+2+co+op+mod In PDF document text
    • http://files.businessrescuene.com/uploads/1/3/1/6/131606257/0ab23f66f0e0.pdfIn PDF document text
    • http://files.porthcawlandthegreatwar.com/uploads/1/3/2/7/132710717/nunoludikidup-tigonipini-goxodovok.pdfIn PDF document text
    • http://files.ethelbustamante.net/uploads/1/3/1/4/131406356/7012749.pdfIn PDF document text
    • http://files.citysquarebarbershop.com/uploads/1/3/0/7/130739174/f78edac53930.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/1/0433/0687/7080/files/4274895189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/nozowumegur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/wifaxivuxanitamenupevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/18799477750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3073/9106/files/nilozikukolelutetaliwuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/fapitazugebivima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/32024557312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/41550872346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7279/6310/files/23132704883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/wimusubopigesomur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zebegevuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4031/6311/files/buvixijexibajepunitojaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/wepezisukimolenotoxa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5F 4812 bytes
SHA-256: 3a11c3d3cbd826ca36a3393217c17350b0429b7debf2f080f9ab639cd70490c6
font_01_sfnt_off00005fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 9880 bytes
SHA-256: e120696f3ed99a7aba50d6ecc9824829fbb3585a20acf45cb5bf5e4372613a29