Malicious PDF — malware analysis report

Static analysis result for SHA-256 421a00fe0aafabaa…

MALICIOUS

PDF

42.1 KB Created: 2020-08-16 13:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd8fc169bfe57418b0373b144086099a SHA-1: e2c6c398e148ee9889578544b99dfa92bd6f40e2 SHA-256: 421a00fe0aafabaad2e08e4af26e8ac1594e67c353e8d32dc7742c354de776d7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=landscape+ecology+forman', is identified as a malicious redirector. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The presence of a link farm indicates an attempt to obscure the final malicious destination or to leverage SEO tactics for distribution.

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.cc/pify?keyword=landscape+ecology+forman
    • http://files.wardmelvilleice.com/uploads/1/3/2/6/132695470/af213ffc.pdf
    • http://files.medicinalplantsinnigeria.com/uploads/1/3/1/3/131380279/woxedapi-zuraxezaguti-bokepalo-rolabetarixe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/xivuvowowiwaviperole.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/vukugepu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/passive_voice_exercises_4_eso.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/falutavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/lizexeduxibulidadovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/busuwijetasevuxavabow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/sample_bio.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/katebexidumadebujoxunigu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/6667099382.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/dark_souls_3_pyromancer_pve_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/80376981298.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/42686853910.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059f7.bin
a0c9b7658e09acce0b65b5db60cfd9c065fd188ca8a7295c68d4b6db1f000505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F7 5176 bytes
font_01_sfnt_off00006b77.bin
dd092bf89be60cf4e1ee4d2e5e6089c7994e3d603f38e25e953503dc64b07ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B77 10076 bytes
font_02_sfnt_off00008ddb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDB 4324 bytes

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