Malicious PDF — malware analysis report

Static analysis result for SHA-256 0440d6af30ff4e00…

MALICIOUS

PDF

46.6 KB Created: 2020-08-27 19:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5404a6a3f95856d26fbd135cfce0467e SHA-1: 649921100d3e3a885b93023f2bbb16a402a9803d SHA-256: 0440d6af30ff4e00d47fdd90637ca06dcd8eddd7741af1c0385cab5e15bf6427
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting a link farm or SEO spamming technique to distribute malicious content.

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=north+node+square+venus+synastry
    • http://negedowe.cpcopywriting.co.uk/uploads/1/3/1/3/131379732/82332855b81a.pdf
    • http://baduvov.jacquelinecutler.com/uploads/1/3/0/8/130814229/76e426f43da.pdf
    • http://viraso.jjraccounting.com/uploads/1/3/0/7/130776394/karetemajepu.pdf
    • http://madukim.jerseyguidedtours.net/uploads/1/3/1/4/131438405/865880.pdf
    • http://ludiboto.hearttoheartstorytelling.com/uploads/1/3/2/8/132814074/5775888.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/mazumukusiridulisarugetet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/boxupesadaba.pdf
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/52103746966.pdf
    • https://cdn.shopify.com/s/files/1/0462/4708/4181/files/28160929865.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/pofexumatulorelezalagur.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/10683542232.pdf
    • https://cdn.shopify.com/s/files/1/0443/1269/0844/files/conceito_de_abandono_escolar.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/lactation_station_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/canon_printer_wifi_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/ratefisofebazoba.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7287/files/best_mastering_plugins_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/tevolujawajodedorilis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df4.bin
251d20dffe9c74cb896b61495a5e74b025a91f9faccdf35b878aaafea50b2005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF4 4972 bytes
font_01_sfnt_off00007ed2.bin
0f5813dd53ae3c1736d5d095bc790cb8fa000740c504c0490469ebf071d079d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED2 9348 bytes
font_02_sfnt_off00009ebc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBC 4324 bytes

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