Malicious PDF — malware analysis report

Static analysis result for SHA-256 1665ea8c947771d7…

MALICIOUS

PDF

55.3 KB Created: 2020-08-08 13:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 558ad002fd0b9020ea73cb32f4a69098 SHA-1: 6070ab5217d21c9947b852ee51a62cfc31c66827 SHA-256: 1665ea8c947771d7377a2f93f7a8c89758a677b485db139bf0f2a4bb672d767b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. The primary lure, however, is a link to 'ttraff.cc', a known malicious redirector. This suggests the document is part of a phishing campaign designed to lead users to malicious sites under the guise of offering free downloads. No scripts were extracted, but the presence of embedded URLs and the ML classification strongly indicate malicious intent.

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.cc/pify?keyword=application+for+tc+in+english+pdf In PDF document text
    • http://files.newadpix.com/uploads/1/3/0/7/130775448/1642464.pdfIn PDF document text
    • http://files.rsitoy.com/uploads/1/3/2/7/132740958/4610470.pdfIn PDF document text
    • http://files.hotstuffromance.com/uploads/1/3/0/7/130739190/1965456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0784/8096/files/estados_financieros_ecopetrol_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/best_book_to_learn_english_speaking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/19223830524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/metajemofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/dujosulijazemezonar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/58162082812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/8608796369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/88469224744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/systematic_combining_an_abductive_approach_to_case_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/sap_mm_blueprint_document.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/4726947975.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_off000077c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 5196 bytes
SHA-256: 0c5b4fc218c50072651668d675fbbfc54eb252e5501adbc267965967bbed6682
font_01_sfnt_off0000895b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 10368 bytes
SHA-256: d785ac48596f7cf9897eb5c344706819294a3d975c1ddc88fdcc337f862f3859
font_02_sfnt_off0000ad05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD05 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74
font_03_sfnt_off0000c197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC197 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378