Malicious PDF — malware analysis report

Static analysis result for SHA-256 150be11caa8b9b00…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 00:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ded6c95b8ae0555182638cce60469f2 SHA-1: 5144e5b38a905ae7c4467ce1ff533ce28981f7cf SHA-256: 150be11caa8b9b00e63f354e48cf2171028ddcc3d015b6f0b7d3a8bc44058084
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host SEO-optimized PDF documents. One of these links, https://ttraff.com/pify?keyword=boiler+feed+water+system+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and other Shopify-hosted PDF files, suggesting a coordinated effort to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=boiler+feed+water+system+pdf
    • http://tugerixak.euroconferences.org/uploads/1/3/1/8/131871721/liwefifewixa_tutaxenik.pdf
    • http://files.cnpstudiotour.ca/uploads/1/3/1/4/131409761/pegofuguzojapavotul.pdf
    • http://files.tristantrapp.com/uploads/1/3/1/1/131164132/8203971.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/benedict_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/barnacle_bill_the_sailor_bass_trombone.pdf
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/18814791088.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/lokoputexox.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/9774571865.pdf
    • https://cdn.shopify.com/s/files/1/0432/3593/4370/files/vavaguwatilusiselipeweb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8625/0137/files/49985278335.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/92270717261.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/69141526195.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/nilumopimamasupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/difference_between_accounting_concepts_and_conventions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/behaviour_management_strategies_in_primary_school.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006369.bin
ffceeac6826d3a074fa580defd0cca1f0ff380dd03ab37e993e2b4155b8ecccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5432 bytes
font_01_sfnt_off000075e2.bin
c8f939395af99c700ed9af3c5d7e56f2d405f643c7a70cf74f76fa1f3356994a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 9772 bytes

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