Malicious PDF — malware analysis report

Static analysis result for SHA-256 1490023318e4db2e…

MALICIOUS

PDF

50.8 KB Created: 2020-08-08 18:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7193a8d0c2e43c76fae0fd15007c84b2 SHA-1: 384b958bd2e4e6a68ff21ac31f81cb379515051c SHA-256: 1490023318e4db2ec85108e68d4d6fd998f736d344f65284272d71f46c65246f
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 of which point to external PDFs, suggesting a link farm or SEO poisoning attempt. One of the primary links directs to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=severe+birth+asphyxia+pdf', which is flagged as a malicious redirector.

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=severe+birth+asphyxia+pdf
    • http://files.haulksmaple.com/uploads/1/3/1/4/131454620/pebivowus.pdf
    • http://lamoj.amayagolf.com/uploads/1/3/2/3/132303382/roxupikiz-riwalopigug.pdf
    • http://files.impactoutreachchurch.com/uploads/1/3/1/4/131406295/8225817.pdf
    • http://files.zendogwalking.net/uploads/1/3/0/7/130776542/8194291.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/mazopavuteb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/96261741329.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gatafuruzakelimosileraji.pdf
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/etiologia_de_la_hipertension_arterial.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/41149487772.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/xozibeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/27635594065.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/36127043874.pdf
    • https://cdn.shopify.com/s/files/1/0433/0825/3344/files/beneficios_de_las_verduras_y_hortalizas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/wipataketanibuwigepim.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/72637638712.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6422/files/troy_bilt_pressure_washer_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/82588886863.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_off00008774.bin
242f58657f344ef7840f40a5b8b5a05956663d09b5aa875675103008d9cd3381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8774 5568 bytes
font_01_sfnt_off00009a67.bin
865df356761889db115ebdfc3c41612f3d037a5127689927972156825c03c11f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A67 10404 bytes

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