Malicious PDF — malware analysis report

Static analysis result for SHA-256 91aaf77c67444b8c…

MALICIOUS

PDF

40.3 KB Created: 2020-08-16 20:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5b24bf3552616f72afea7bca97a5a95 SHA-1: a022211f37c6eac207474afcb5440943d1169908 SHA-256: 91aaf77c67444b8cb3991c88865298ec51920f46a15b6083d67bd78d41a8afd3
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a game title. The document also hosts a large number of external PDF links, many pointing to shopify.com, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary malicious action appears to be redirecting the user to a potentially harmful site.

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=bandbudh+aur+budbak+adventure+game In PDF document text
    • http://files.deepquest.institute/uploads/1/3/0/7/130738619/zoxixoju-wugapunazinefit.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/1/0429/6628/6490/files/6552209270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/online_converter_to_word_ocr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/14139954323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/the_decameron_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0341/0593/files/fopibugirusuxajuvuvuguba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/65093857657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/windows_server_2020_system_administrator_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2504/6423/files/socioeconomic_status_and_academic_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/7858/4229/files/83695680598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/for_the_love_of_money_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/61669827862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/71669877985.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_off00004a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A02 5340 bytes
SHA-256: 4e25e17ad7e7d8f5c364296331d8e25f80cb0eda1fabb2217fdfeb3739c8763f
font_01_sfnt_off00005c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C04 10248 bytes
SHA-256: a407ad90a0e3052ca0644cf2f7b268b5fa42bc29c51a6299fab3a2b498a8fa62
font_02_sfnt_off00007f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F55 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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