Malicious PDF — malware analysis report

Static analysis result for SHA-256 650c27f8b1409178…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 08:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea50ccaa92698835b2c0765616f9a724 SHA-1: 7328086ef860b5b4f69dc9132f0f85cc66be9fa8 SHA-256: 650c27f8b14091785ea94a7f9118c4a500b1a8d674c14cd08dd0ba247b969e41
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly indicate malicious intent.

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=practical+seismic+data+analysis+pdf
    • http://papud.theopenbus.com/uploads/1/3/0/7/130775413/texexixusavi-tavumuf.pdf
    • http://files.indoorairsolutionsga.com/uploads/1/3/1/4/131453657/2571870.pdf
    • http://files.kaylahmarieartworks.net/uploads/1/3/0/9/130969925/sibora.pdf
    • http://rujuma.becomingafamilydoc.ca/uploads/1/3/1/8/131856476/zukotilazu_wesinodika.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/nigivizigavuzematifirevo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/barista_resume.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/17015938436.pdf
    • https://cdn.shopify.com/s/files/1/0440/6244/1622/files/advocateship_mcq_model_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/47773203845.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2496/files/latin_american_history_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/51649414793.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/zebaxemewasuxidesuzen.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4119/files/pezalotuniwerajanolig.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/57286837737.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/fundamentals_of_flight_richard_s_shevell.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/verizon_fios_channel_guide_2015.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/ejercicios_clases_de_sustantivos_1_eso.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_off0000601b.bin
869390df46d2c0fe6152ef8777970c8b66f2bcfcf937b36c6ccc5aaed5b07728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601B 5404 bytes
font_01_sfnt_off0000726a.bin
f0d802ad59f01538f2c86b62cee25b866b659be8d45e780d07346f393c5385cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726A 10264 bytes

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