Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a2f611f78893f2…

MALICIOUS

PDF

48.8 KB Created: 2020-08-17 07:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3be948faf8510159c48618ad886d3667 SHA-1: 1b71cb4198fd6a4221871776e5b693223673d3e6 SHA-256: 37a2f611f78893f224b0ae9b03c9b16ca371c30ff3f123ca44158043855197f7
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a redirector, indicating a phishing or social engineering attempt. The document body and embedded links suggest a lure for a 'bubble shooter apk for android'. The primary malicious URL identified is ttraff.cc, which is known to host redirectors. The file is a PDF generated by wkhtmltopdf, a common tool for creating PDFs from web content, which can be abused for malicious purposes.

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=bubble+shooter+apk+for+android In PDF document text
    • http://files.ucpgreatchefs.com/uploads/1/3/0/7/130739348/9133cd9d69.pdfIn PDF document text
    • http://files.centennialpto.org/uploads/1/3/0/7/130775154/1471241.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/1/0434/4496/1442/files/dokoxuvumujizojere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/tuduvezukodubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/35282858220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/29671465421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/download_java_jdk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/carson_dellosa_math_5th_grade_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3868/7900/files/61081036462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/94144245825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/sukisexupekav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/rorajuvo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5202 5384 bytes
SHA-256: ed2c4af937117a77a8f610bd9c49457f2a64393272dacecedb6f80cbe5387fb4
font_01_sfnt_off00006437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 1944 bytes
SHA-256: cf59a1c105ebc0425001a103fd3720db8079a93491def8cdf6e7b06015e454fc
font_02_sfnt_off00006d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 16592 bytes
SHA-256: b41e4363dc2a935324fff20c79b79b944e996ffd72f26078072ba685887111d8
font_03_sfnt_off00009f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F98 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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