Malicious PDF — malware analysis report

Static analysis result for SHA-256 df47a5709afbecf5…

MALICIOUS

PDF

41.2 KB Created: 2020-07-08 21:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: a5b002b2b8434ad4df752dab8a5d9314 SHA-1: e04307ea8467f557da3d4a3ca24b5d81d286598d SHA-256: df47a5709afbecf51afbbc90e7d216c2fb4b07d6c555d67b079a820daae0c3cd
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.cc', indicating a malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially garbled, includes the title 'Rules of exponents worksheet 8th grade' alongside the malicious URLs, suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-8973156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8973156-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=rules%20of%20exponents%20worksheet%208th%20grade In PDF document text
    • http://files.ninjamagik.com/uploads/1/3/0/8/130874629/jatupisejumelovavog.pdfIn PDF document text
    • http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdfIn PDF document text
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdfIn PDF document text
    • http://files.moirajo.com/uploads/1/3/2/7/132710655/6052939.pdfIn PDF document text
    • http://files.loudonindustries.com/uploads/1/3/1/1/131164252/1797390.pdfIn PDF document text
    • http://files.textilesfsg.com/uploads/1/3/1/4/131406835/6014229.pdfIn PDF document text
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://surugevebi358397781.files.wordpress.com/2020/07/61849451890.pdfIn PDF document text
    • https://fomeruzemega.files.wordpress.com/2020/07/wopolobala.pdfIn PDF document text
    • https://xobajowupoda.files.wordpress.com/2020/07/85889919483.pdfIn PDF document text
    • https://wakoxodapore.files.wordpress.com/2020/06/dabopafiwebotip.pdfIn PDF document text
    • https://dorupotidosu.files.wordpress.com/2020/06/71434371464.pdfIn PDF document text
    • https://wedopozox.files.wordpress.com/2020/06/73482252590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 5560 bytes
SHA-256: 52fec01454de6c8ab062e4d31adc498c8e96e66ce8d1cd856f3a9b7e3007e3c6
font_01_sfnt_off0000716a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716A 11480 bytes
SHA-256: 7e9a9b858c37d87e2176492e440e7ff00aba70e89ded794b9e9aa548618ba80a

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